“show your hand”, 在谈判中，是什么意思？

In negotiations, never show your hand too early.
“show your hand”, 在谈判中，我们不要过早干嘛呢？
A、握手
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选B，to allow people to know about intentions that you had previously kept secret。谈判时过早让对方知道了我们的底牌便失去了谈判的主动权。