They don't shake hands after they haven't met for a long time or when they will

They don't shake hands after they haven't met for a long time or when they will be away from each other for a long time.翻譯最好能把原短文翻譯一下！！！

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他們很久沒有相見或者他們將要分開很久，他們也沒有握手
差不多這個意思，華麗麗點的，我也寫不出來了。。