當(dāng)我們遇到困難或者處于人生低谷的時候，我們的家人和朋友會說 Don't look back. You are never completely alone.不要回頭看，大家一起向前沖！而今天，我們著重要講的短語卻是watch your back，乍聽意思是要你回頭看，“看你的后背”。
    后背有什么好瞧的？其實，watch your back的意思是：to be careful of the people around you, making certain that they do nothing to harm you。這是一個比喻，意思就是要當(dāng)心有人或者是什么事情可能會對你不利。簡言之，就是“小心行事！”的意思。這句話在好萊塢電影中經(jīng)常出現(xiàn)。有時候根據(jù)語境不同會有各種隱含意思，比如，你要小心，我要收拾你，或者，你快完蛋了！但基本意思就是提醒對方謹(jǐn)慎的意思。
    Watch your back 怎么用呢？讓我們來看看下面這段對話：
    A: I think you should make sure that you've kept notes from that meeting with Alan.
    B: Yeah, you're probably right.
    A: I mean someone might say you said something you didn't--you need to watch your back.
    再看一個例句： I have to watch my back at work--there are a lot of people who would like my job.
    上面兩個例子聽起來好像很緊張，不過卻印證了“職場如戰(zhàn)場”這句老話。
    下一次，如果你想提醒某些人，你就可以tell them to watch their back。
    有時候，watch your back 還有一個更簡單直接的含義，it could simply mean be careful of your back as in our body part。當(dāng)心你的腰，別讓腰受傷。這個意思就跟實實在在的人的身體有關(guān)了，所以應(yīng)該更加便于掌握。
    例句： We should all watch our back. Back pain is one of the biggest health problems people experience in life.