“再见”你都会怎么说？我们常见的有bye, goodbye, see you等等，今天再来学习一个 catch you later。 

Catch you later 的意思就是：现在没有时间与你交谈，以后再谈吧！(I don't have time to talk with you now, but we can talk later.) 因此，catch就是talk或contact的意思。catch后面，也可用其他人称代名词（him, her, them等等），例如：I just called to say hi and hopefully we'll talk tomorrow — catch you later. 

这个片语常用在句尾。