cry wolf

call for help when it is not needed, with the effect that one is not believed when one really does need help

喊“狼来了”；发假警报

hold (或 have) a wolf by the ears

be in a precarious position

处于危急状况

keep the wolf from the door

have enough money to avert hunger or starvation (used hyperbolically)

（夸张地）免于穷困；免于挨饿

I work part-time to pay the mortgage and keep the wolf from the door.

我做兼职是为了偿还购房抵押贷款，还有免于挨饿。

throw someone to the wolves

leave someone to be roughly treated or criticized without trying to help or defend them

弃某人于危险（或困境）而不顾

a wolf in sheep's clothing

a person or thing that appears friendly or harmless but is really hostile

披着羊皮的狼，伪装友善的敌人

keep the wolf from the door&I{【俚语】}

To avoid the privation and suffering resulting from a lack of money

免于穷困：为避免穷困和由于缺钱而造成的痛苦

Both spouses had to take jobs in order to keep the wolf from the door.

为避免受饥寒之苦，夫妻俩不得不双双工作

wolf at the door

Creditors or a creditor.

债权人

wolf in sheep's clothing

One who feigns congeniality while actually holding malevolent intentions.

披着羊皮的狼：假装意气相投但实际上怀着恶毒意图的人