someone's bark is worse than their bite

said of someone whose fierce and intimidating manner does not reflect their nature

嘴巴狠，心肠软

be bitten by the — bug

develop a passionate interest in a specified activity

开始迷上，热衷于

Joe was badly bitten by the showbiz bug at the age of four.

乔四岁就迷上了演艺活动。

bite the big one

(N. Amer. informal)die

(北美，非正式)死去，咽气

bite the bullet

decide to do something difficult or unpleasant that one has been putting off or hesitating over

最终下定决心行动起来

bite the dust

(informal)be killed

(非正式)被杀死

bite the hand that feeds one

deliberately hurt or offend a benefactor

恩将仇报

bite someone's head off

bite one's lip

dig one's front teeth into one's lip in embarrassment, grief, or annoyance, or to prevent oneself from saying something

（因尴尬、悲伤、生气或不愿开口）而紧咬着嘴唇

bite one's nails

chew at one's nails as a nervous habit

（紧张时习惯性地）咬指甲，焦躁不安

the biter bitten (或 bit)

used to indicate that someone is being treated in the same way as they have treated others, typically badly

骗人者遭骗

bite one's tongue

make a desperate effort to avoid saying something

一言不发，死不开口

I had to bite my tongue and accept his explanation.

我只得一言不发地接受了他的解释。

one could have bitten one's tongue off

used to convey that one profoundly and immediately regrets having said something

话刚出口就懊悔不已

once bitten, twice shy

(proverb)an unpleasant experience induces caution

(谚)一次吃亏，下次小心；一次被咬，下次胆小

put the bite on

(N. Amer. & Austral. informal)borrow or extort money from

(北美，澳，非正式)向…借（或勒索）钱财