bite的过去分词是bitten，shy有“害羞的”的意思，那once bitten，twice shy是什么意思呢？

once bitten，twice shy的意思是“said when you are frightened to do something again because you had an unpleasant experience doing it the first time”，即“一次被咬，下次胆小；一朝被蛇咬，十年怕草绳”。也就是指某个人经历某事以后就变得胆小怕事。

这里补充一下，shy不仅有“害羞的”的意思，它还有“胆小的”的意思。这个单词是动词时，它的意思是“（尤指马) 被吓退；被惊走”。bite的过去式是bit，现在分词是biting，过去分词是bitten。

例句：

Amy was bitten by a dog last week, and now she leaves when she sees the dog. Once bitten, twice shy.

艾米上周被狗咬了，现在看到狗就离开。所谓一朝被蛇咬，十年怕井绳。

下面再介绍两个关于bite的习语：

be bitten by sth.

be bitten by sth.的意思是“to develop a strong interest in or enthusiasm for sth.”，即“对某事物着迷，热衷于某事物”。

例句如下：

Mike has been bitten by the Japanese food.

迈克迷上了日本菜。

bite one's tongue

bite one's tongue的意思是“to stop oneself from saying sth that might upset sb. or cause an argument, although someone wants to speak”，即“隐忍不言（避免祸从口出）”。

举个例子：

I didn't believe his explanation but I bit my tongue.

我不相信她的解释，但我忍着没有说出来。

出处：头条号 @梨梨学英语