下面就针对该问题来做个简单介绍，希望这样介绍对有需要人能带来帮助。
The following is a brief introduction to the problem, I hope this will be able to help people in need.
假定你已经知道何谓联盟——如果不知道，我先给你做个简单的介绍。
I'm assuming you already know what that is, but if not, let me give you a quick explanation...
假定你已经知道何谓联盟——如果不知道，我先给你做个简单的介绍。
I'm assuming you already know what that is, but if not, let me give you a quick explanation...
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