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Communication: An important aspect of communication
for humans is to know how the other person reacts to
what one says. To judge a reaction, typically a person
would read this information from body gestures, the face,
and the voice of the other person. In DXP(分布式极限编程，专有名词）, since the two people are not physically next to each other, how can one receive this information?
参考答案:交流：对人类而言，交流的一个很重要的方面就是读懂对方对你的语言所产生的反应。而如何判断一个反应，最典型的就是从肢体语言、表情、声音等方面来获取信息。在分布式极限编程中，由于两个人无法直接看到对方的身体，那怎样才能获得这种信息呢？