Your IP address 58.39.140.173 is already downloading a file. You have to wait until it is finished

翻译：你的IP地址58.39.140.173正在下载一个文件。你必须等它下载完。

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如果你是在下哪个外国网盘的东西，就是说这个网盘禁止多个文件同时下载，只能等前面一个下完才能下后面一个。