OddFar's Notes
zhiyuan
2023-03-26
目录

某度翻译

# js分析

请求网站，查看所需要的数据，找到所对应的url

image-20230326155924298

请求参数里需要sign和token

这个token试过了不需要动，只需解决sign即可

sign是根据输入的内容生成的

image-20230326160120354

复制请求的url：https://fanyi.baidu.com/v2transapi

先打个断点

image-20230326160441349

点击翻译，断住了，可以看到数据里有所需要的sign

image-20230326160737655

我们需要找到 ajax 请求，看看里面的数据

在 调用堆栈里依次点击，找到需要的数据，发现在第三个堆栈里

data: w, w就是请求的数据，

image-20230326161021630

可以控制台输出一下，里面有所需要的sign值

和之前请求翻译“你好”的sign一样，说明值是根据输入内容生成的

image-20230326161310312

根据w的内容，可以知道sign是由 b(e) 生成的

 w = {
    from: v.fromLang,
    to: v.toLang,
    query: e,
    transtype: i,
    simple_means_flag: 3,
    sign: b(e),
    token: window.common.token,
    domain: k.getCurDomain()
},
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image-20230326173216956

控制台输出一下 b(e)，这个值就是我们想要的

 b(e)
'232427.485594'
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鼠标光标放到b上，左键单击进入方法

image-20230326162107779

可以看到，这个方法就是生成 sign 的

image-20230326162247134

执行js代码

我用的pycharm，需要安装nodejs环境

function sign(t) {
    var o, i = t.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g);
    if (null === i) {
        var a = t.length;
        a > 30 && (t = "".concat(t.substr(0, 10)).concat(t.substr(Math.floor(a / 2) - 5, 10)).concat(t.substr(-10, 10)))
    } else {
        for (var s = t.split(/[\uD800-\uDBFF][\uDC00-\uDFFF]/), c = 0, l = s.length, u = []; c < l; c++)
            "" !== s[c] && u.push.apply(u, function (t) {
                if (Array.isArray(t))
                    return e(t)
            }(o = s[c].split("")) || function (t) {
                if ("undefined" != typeof Symbol && null != t[Symbol.iterator] || null != t["@@iterator"])
                    return Array.from(t)
            }(o) || function (t, n) {
                if (t) {
                    if ("string" == typeof t)
                        return e(t, n);
                    var r = Object.prototype.toString.call(t).slice(8, -1);
                    return "Object" === r && t.constructor && (r = t.constructor.name),
                        "Map" === r || "Set" === r ? Array.from(t) : "Arguments" === r || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(r) ? e(t, n) : void 0
                }
            }(o) || function () {
                throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")
            }()),
            c !== l - 1 && u.push(i[c]);
        var p = u.length;
        p > 30 && (t = u.slice(0, 10).join("") + u.slice(Math.floor(p / 2) - 5, Math.floor(p / 2) + 5).join("") + u.slice(-10).join(""))
    }
    for (var d = "".concat(String.fromCharCode(103)).concat(String.fromCharCode(116)).concat(String.fromCharCode(107)), h = (null !== r ? r : (r = window[d] || "") || "").split("."), f = Number(h[0]) || 0, m = Number(h[1]) || 0, g = [], y = 0, v = 0; v < t.length; v++) {
        var _ = t.charCodeAt(v);
        _ < 128 ? g[y++] = _ : (_ < 2048 ? g[y++] = _ >> 6 | 192 : (55296 == (64512 & _) && v + 1 < t.length && 56320 == (64512 & t.charCodeAt(v + 1)) ? (_ = 65536 + ((1023 & _) << 10) + (1023 & t.charCodeAt(++v)),
            g[y++] = _ >> 18 | 240,
            g[y++] = _ >> 12 & 63 | 128) : g[y++] = _ >> 12 | 224,
            g[y++] = _ >> 6 & 63 | 128),
            g[y++] = 63 & _ | 128)
    }
    for (var b = f, w = "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(97)) + "".concat(String.fromCharCode(94)).concat(String.fromCharCode(43)).concat(String.fromCharCode(54)), k = "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(51)) + "".concat(String.fromCharCode(94)).concat(String.fromCharCode(43)).concat(String.fromCharCode(98)) + "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(102)), x = 0; x < g.length; x++)
        b = n(b += g[x], w);
    return b = n(b, k),
    (b ^= m) < 0 && (b = 2147483648 + (2147483647 & b)),
        "".concat((b %= 1e6).toString(), ".").concat(b ^ f)
}
console.log(sign("你好"))
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执行结果：

  for (var d = "".concat(String.fromCharCode(103)).concat(String.fromCharCode(116)).concat(String.fromCharCode(107)), h = (null !== r ? r : (r = window[d] || "") || "").split("."), f = Number(h[0]) || 0, m = Number(h[1]) || 0, g = [], y = 0, v = 0; v < t.length; v++) {
                                                                                                                            ^

ReferenceError: r is not defined
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image-20230326165115297

报错内容是r is not defined，找不到r

定位到报错代码所在行，打个断点

image-20230326165226579

重新发送请求，点跳转到下一个函数调用，执行

image-20230326195132145

可以看到r是个字符串，内容为："320305.131321201"

image-20230326195504435

我们先把 r 写死

var r = "320305.131321201";
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重新执行下js，报错找不到n方法

image-20230326172150445

去找一下 n 方法，打个断定，继续执行脚本

image-20230326194630959

找到n方法

function n(t, e) {
    for (var n = 0; n < e.length - 2; n += 3) {
        var r = e.charAt(n + 2);
        r = "a" <= r ? r.charCodeAt(0) - 87 : Number(r),
        r = "+" === e.charAt(n + 1) ? t >>> r : t << r,
        t = "+" === e.charAt(n) ? t + r & 4294967295 : t ^ r
    }
    return t
}
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完整代码js

function n(t, e) {
    for (var n = 0; n < e.length - 2; n += 3) {
        var r = e.charAt(n + 2);
        r = "a" <= r ? r.charCodeAt(0) - 87 : Number(r),
        r = "+" === e.charAt(n + 1) ? t >>> r : t << r,
        t = "+" === e.charAt(n) ? t + r & 4294967295 : t ^ r
    }
    return t
}

var r = "320305.131321201";

function sign(t) {
    var o, i = t.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g);
    if (null === i) {
        var a = t.length;
        a > 30 && (t = "".concat(t.substr(0, 10)).concat(t.substr(Math.floor(a / 2) - 5, 10)).concat(t.substr(-10, 10)))
    } else {
        for (var s = t.split(/[\uD800-\uDBFF][\uDC00-\uDFFF]/), c = 0, l = s.length, u = []; c < l; c++)
            "" !== s[c] && u.push.apply(u, function (t) {
                if (Array.isArray(t))
                    return e(t)
            }(o = s[c].split("")) || function (t) {
                if ("undefined" != typeof Symbol && null != t[Symbol.iterator] || null != t["@@iterator"])
                    return Array.from(t)
            }(o) || function (t, n) {
                if (t) {
                    if ("string" == typeof t)
                        return e(t, n);
                    var r = Object.prototype.toString.call(t).slice(8, -1);
                    return "Object" === r && t.constructor && (r = t.constructor.name),
                        "Map" === r || "Set" === r ? Array.from(t) : "Arguments" === r || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(r) ? e(t, n) : void 0
                }
            }(o) || function () {
                throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")
            }()),
            c !== l - 1 && u.push(i[c]);
        var p = u.length;
        p > 30 && (t = u.slice(0, 10).join("") + u.slice(Math.floor(p / 2) - 5, Math.floor(p / 2) + 5).join("") + u.slice(-10).join(""))
    }
    for (var d = "".concat(String.fromCharCode(103)).concat(String.fromCharCode(116)).concat(String.fromCharCode(107)), h = (null !== r ? r : "").split("."), f = Number(h[0]) || 0, m = Number(h[1]) || 0, g = [], y = 0, v = 0; v < t.length; v++) {
        var _ = t.charCodeAt(v);
        _ < 128 ? g[y++] = _ : (_ < 2048 ? g[y++] = _ >> 6 | 192 : (55296 == (64512 & _) && v + 1 < t.length && 56320 == (64512 & t.charCodeAt(v + 1)) ? (_ = 65536 + ((1023 & _) << 10) + (1023 & t.charCodeAt(++v)),
            g[y++] = _ >> 18 | 240,
            g[y++] = _ >> 12 & 63 | 128) : g[y++] = _ >> 12 | 224,
            g[y++] = _ >> 6 & 63 | 128),
            g[y++] = 63 & _ | 128)
    }
    for (var b = f, w = "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(97)) + "".concat(String.fromCharCode(94)).concat(String.fromCharCode(43)).concat(String.fromCharCode(54)), k = "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(51)) + "".concat(String.fromCharCode(94)).concat(String.fromCharCode(43)).concat(String.fromCharCode(98)) + "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(102)), x = 0; x < g.length; x++)
        b = n(b += g[x], w);
    return b = n(b, k),
    (b ^= m) < 0 && (b = 2147483648 + (2147483647 & b)),
        "".concat((b %= 1e6).toString(), ".").concat(b ^ f)
}

console.log(sign("你好"))
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执行结果

232427.485594
1

和之前要的sign值一样

# python爬虫

在此网站上：https://curlconverter.com/

把cURL转换成python代码

image-20230326200055161

pyhton代码：

import json
import requests
import execjs

def get_sign(vlues):

    # 读取js文件的内容
    with open('getSign.js', 'r', encoding='utf-8') as f:
        js_code = f.read()

    # 通过execjs.compile()进行编译js文件内容
    compile_result = execjs.compile(js_code)
    # 调用js文件传参
    # weixin是js中的function方法名，inp是穿的参
    result = compile_result.call('sign', vlues)
    return result

def spider(value):
    cookies = {
        'BAIDUID': 'E7E4E0567FBE9DEDF43C583B9E60119F:FG=1',
        'REALTIME_TRANS_SWITCH': '1',
        'FANYI_WORD_SWITCH': '1',
        'HISTORY_SWITCH': '1',
        'SOUND_SPD_SWITCH': '1',
        'SOUND_PREFER_SWITCH': '1',
        'BIDUPSID': 'E7E4E0567FBE9DEDF43C583B9E60119F',
        'PSTM': '1662006000',
        'APPGUIDE_10_0_2': '1',
        'BDORZ': 'B490B5EBF6F3CD402E515D22BCDA1598',
        'H_PS_PSSID': '36547_38113_38359_38404_37862_38468_38174_38289_38257_37934_38382_26350_38417_37881',
        'BDSFRCVID': '2AFOJeC629rz1DRfXd9v5P_3d5XzF9QTH6aomM5W3L3Q6y9KgdxmEG0Pqx8g0KAbMVkPogKKBmOTHn_F_2uxOjjg8UtVJeC6EG0Ptf8g0M5',
        'H_BDCLCKID_SF': 'tJPJoKDbJKD3jR5m-R5HMtCyqxby2C62aJ0H5lQvWJ5TMC_wKRCaQhDEWM88-jQTXb7b_xnL3DTGShPC-tnVXjLiDPkeQ658fm3M0PnE3l02V-j9e-t2yU_VXJjWQPRMW23GWl7mWnrrsxA45J7cM4IseboJLfT-0bc4KKJxbnLWeIJEjj6jK4JKDGAOJ6cP',
        'Hm_lvt_64ecd82404c51e03dc91cb9e8c025574': '1678884815,1679816757',
        'delPer': '0',
        'PSINO': '1',
        'BAIDUID_BFESS': 'E7E4E0567FBE9DEDF43C583B9E60119F:FG=1',
        'BDSFRCVID_BFESS': '2AFOJeC629rz1DRfXd9v5P_3d5XzF9QTH6aomM5W3L3Q6y9KgdxmEG0Pqx8g0KAbMVkPogKKBmOTHn_F_2uxOjjg8UtVJeC6EG0Ptf8g0M5',
        'H_BDCLCKID_SF_BFESS': 'tJPJoKDbJKD3jR5m-R5HMtCyqxby2C62aJ0H5lQvWJ5TMC_wKRCaQhDEWM88-jQTXb7b_xnL3DTGShPC-tnVXjLiDPkeQ658fm3M0PnE3l02V-j9e-t2yU_VXJjWQPRMW23GWl7mWnrrsxA45J7cM4IseboJLfT-0bc4KKJxbnLWeIJEjj6jK4JKDGAOJ6cP',
        'Hm_lpvt_64ecd82404c51e03dc91cb9e8c025574': '1679827229',
        'ab_sr': '1.0.1_ZDc2NWQ5ODZiNDI1NjczMTRjYjRlNWY3YTNhZmY2ODAyZjcxM2MyZmM1ODQ1ZTg4NTIwYmNlOWMwYjk4ZjFhMjQzNTBjMzVjYzg4NTMxODI0NWEyNDBiNDljYWEyOGY1YTlkZWQyMzAwZmU3MGY0N2ZiZjEzMjM5ZDZkOWM3NjA2MzAxMTE0OTkxNTFhNTMwYmI5OTM5OGNkZTFiZjhiNA==',
    }

    headers = {
        'Accept': '*/*',
        'Accept-Language': 'zh-CN,zh;q=0.9',
        'Acs-Token': '1679831923507_1679831922998_WgGGMV2Y27GwWX9/lcuaMP6Dn3dAzyKShwVfdY3ZvbGZlRi8qcN5M+d4u6tZoV0uV+9HmN2ZaofOexoL6zE8Y6dT7j1AzIF96PjQK5W6ODi5XZ5h2+fNVgP+zZXlhHzr0v2C4Q36HXgFR60nlxaPJG/1Ss+CNd71j94XdKAKMzsaSbJJ4XBxQrmHcUc4uDvtyjFIjn5xCiyhh9fWML6lXakNjAtPDAr0QnoufugFaaQGbzhYaLWRnm7GeV1vHwC9eBW6pDnHmzFmV1dEIJ8PD86wGQwIfJi0l/NJNJaYB5/RLCkajs3XfEAmhDqI+uGPNGy9rimDqL15qldEPYwSNcWsJh8q1A0eMvvxJMfRQ+8=',
        'Connection': 'keep-alive',
        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
        # 'Cookie': 'BAIDUID=E7E4E0567FBE9DEDF43C583B9E60119F:FG=1; REALTIME_TRANS_SWITCH=1; FANYI_WORD_SWITCH=1; HISTORY_SWITCH=1; SOUND_SPD_SWITCH=1; SOUND_PREFER_SWITCH=1; BIDUPSID=E7E4E0567FBE9DEDF43C583B9E60119F; PSTM=1662006000; APPGUIDE_10_0_2=1; BDORZ=B490B5EBF6F3CD402E515D22BCDA1598; H_PS_PSSID=36547_38113_38359_38404_37862_38468_38174_38289_38257_37934_38382_26350_38417_37881; BDSFRCVID=2AFOJeC629rz1DRfXd9v5P_3d5XzF9QTH6aomM5W3L3Q6y9KgdxmEG0Pqx8g0KAbMVkPogKKBmOTHn_F_2uxOjjg8UtVJeC6EG0Ptf8g0M5; H_BDCLCKID_SF=tJPJoKDbJKD3jR5m-R5HMtCyqxby2C62aJ0H5lQvWJ5TMC_wKRCaQhDEWM88-jQTXb7b_xnL3DTGShPC-tnVXjLiDPkeQ658fm3M0PnE3l02V-j9e-t2yU_VXJjWQPRMW23GWl7mWnrrsxA45J7cM4IseboJLfT-0bc4KKJxbnLWeIJEjj6jK4JKDGAOJ6cP; Hm_lvt_64ecd82404c51e03dc91cb9e8c025574=1678884815,1679816757; delPer=0; PSINO=1; BAIDUID_BFESS=E7E4E0567FBE9DEDF43C583B9E60119F:FG=1; BDSFRCVID_BFESS=2AFOJeC629rz1DRfXd9v5P_3d5XzF9QTH6aomM5W3L3Q6y9KgdxmEG0Pqx8g0KAbMVkPogKKBmOTHn_F_2uxOjjg8UtVJeC6EG0Ptf8g0M5; H_BDCLCKID_SF_BFESS=tJPJoKDbJKD3jR5m-R5HMtCyqxby2C62aJ0H5lQvWJ5TMC_wKRCaQhDEWM88-jQTXb7b_xnL3DTGShPC-tnVXjLiDPkeQ658fm3M0PnE3l02V-j9e-t2yU_VXJjWQPRMW23GWl7mWnrrsxA45J7cM4IseboJLfT-0bc4KKJxbnLWeIJEjj6jK4JKDGAOJ6cP; Hm_lpvt_64ecd82404c51e03dc91cb9e8c025574=1679827229; ab_sr=1.0.1_ZDc2NWQ5ODZiNDI1NjczMTRjYjRlNWY3YTNhZmY2ODAyZjcxM2MyZmM1ODQ1ZTg4NTIwYmNlOWMwYjk4ZjFhMjQzNTBjMzVjYzg4NTMxODI0NWEyNDBiNDljYWEyOGY1YTlkZWQyMzAwZmU3MGY0N2ZiZjEzMjM5ZDZkOWM3NjA2MzAxMTE0OTkxNTFhNTMwYmI5OTM5OGNkZTFiZjhiNA==',
        'Origin': 'https://fanyi.baidu.com',
        'Referer': 'https://fanyi.baidu.com/',
        'Sec-Fetch-Dest': 'empty',
        'Sec-Fetch-Mode': 'cors',
        'Sec-Fetch-Site': 'same-origin',
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36',
        'X-Requested-With': 'XMLHttpRequest',
        'sec-ch-ua': '"Google Chrome";v="111", "Not(A:Brand";v="8", "Chromium";v="111"',
        'sec-ch-ua-mobile': '?0',
        'sec-ch-ua-platform': '"Windows"',
        'token': 'eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJwa19pZCI6MSwiYV9pZCI6IiIsImR0eXBlIjoxLCJpZCI6MSwiZXhwIjoxNjc4NzI0MTQxLCJ0eXBlIjoieXp5IiwiaWF0IjoxNjc4NzE2OTQxfQ.Ztx8Dp3ooCtz9nc5XF6tQ3CFatDTeb4gXwxbG14B780',
        'uid': '1',
    }

    params = {
        'from': 'zh',
        'to': 'en',
    }

    data = {
        'from': 'zh',
        'to': 'en',
        'query': value,
        'transtype': 'translang',
        'simple_means_flag': '3',
        'sign': get_sign(value),
        'token': '34032f562bee3207e4dc0085490c43e3',
        'domain': 'common',
    }

    response = requests.post('https://fanyi.baidu.com/v2transapi', params=params, cookies=cookies, headers=headers,
                             data=data)
    res = json.loads(response.text)
    print(res)

if __name__ == '__main__':
    spider('你好')
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js：

function n(t, e) {
    for (var n = 0; n < e.length - 2; n += 3) {
        var r = e.charAt(n + 2);
        r = "a" <= r ? r.charCodeAt(0) - 87 : Number(r),
        r = "+" === e.charAt(n + 1) ? t >>> r : t << r,
        t = "+" === e.charAt(n) ? t + r & 4294967295 : t ^ r
    }
    return t
}

var r = "320305.131321201";

function sign(t) {
    var o, i = t.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g);
    if (null === i) {
        var a = t.length;
        a > 30 && (t = "".concat(t.substr(0, 10)).concat(t.substr(Math.floor(a / 2) - 5, 10)).concat(t.substr(-10, 10)))
    } else {
        for (var s = t.split(/[\uD800-\uDBFF][\uDC00-\uDFFF]/), c = 0, l = s.length, u = []; c < l; c++)
            "" !== s[c] && u.push.apply(u, function (t) {
                if (Array.isArray(t))
                    return e(t)
            }(o = s[c].split("")) || function (t) {
                if ("undefined" != typeof Symbol && null != t[Symbol.iterator] || null != t["@@iterator"])
                    return Array.from(t)
            }(o) || function (t, n) {
                if (t) {
                    if ("string" == typeof t)
                        return e(t, n);
                    var r = Object.prototype.toString.call(t).slice(8, -1);
                    return "Object" === r && t.constructor && (r = t.constructor.name),
                        "Map" === r || "Set" === r ? Array.from(t) : "Arguments" === r || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(r) ? e(t, n) : void 0
                }
            }(o) || function () {
                throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")
            }()),
            c !== l - 1 && u.push(i[c]);
        var p = u.length;
        p > 30 && (t = u.slice(0, 10).join("") + u.slice(Math.floor(p / 2) - 5, Math.floor(p / 2) + 5).join("") + u.slice(-10).join(""))
    }
    for (var d = "".concat(String.fromCharCode(103)).concat(String.fromCharCode(116)).concat(String.fromCharCode(107)), h = (null !== r ? r : "").split("."), f = Number(h[0]) || 0, m = Number(h[1]) || 0, g = [], y = 0, v = 0; v < t.length; v++) {
        var _ = t.charCodeAt(v);
        _ < 128 ? g[y++] = _ : (_ < 2048 ? g[y++] = _ >> 6 | 192 : (55296 == (64512 & _) && v + 1 < t.length && 56320 == (64512 & t.charCodeAt(v + 1)) ? (_ = 65536 + ((1023 & _) << 10) + (1023 & t.charCodeAt(++v)),
            g[y++] = _ >> 18 | 240,
            g[y++] = _ >> 12 & 63 | 128) : g[y++] = _ >> 12 | 224,
            g[y++] = _ >> 6 & 63 | 128),
            g[y++] = 63 & _ | 128)
    }
    for (var b = f, w = "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(97)) + "".concat(String.fromCharCode(94)).concat(String.fromCharCode(43)).concat(String.fromCharCode(54)), k = "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(51)) + "".concat(String.fromCharCode(94)).concat(String.fromCharCode(43)).concat(String.fromCharCode(98)) + "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(102)), x = 0; x < g.length; x++)
        b = n(b += g[x], w);
    return b = n(b, k),
    (b ^= m) < 0 && (b = 2147483648 + (2147483647 & b)),
        "".concat((b %= 1e6).toString(), ".").concat(b ^ f)
}

console.log(sign("你好"))
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运行结果

image-20230326205610740

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最后更新: 2023/03/27, 13:03:00
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