终于联机了，但有几个问题！

xtq

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alterIWnet
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Non-English MW2 language files have been detected. This may cause problems with connecting to servers. Only English game versions are officially supported by alterIWnet.
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确定   
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运行 iw4mp.exe 后为什么提示这个？还有就是单机部分不能玩了！怎么样才可以玩？