1. 表述：be ( as ) weak as a cat
释义：Especially weak, feeble, and vulnerable; completely unable to defend oneself. （身体虚脱，意志薄弱，性格懦弱）
例句：The heart attack left me bedridden and weak as a cat for nearly a month.
Tom's always been as weak as a cat, so we don't bother trying to roughhouse with him at all.
He has been as weak as a cat because of long period hard work.
I was as weak as a cat from the flu so I couldn’t work.
2. 表述：by hook or by crook
释义：In any way possible. （不折手段，用各种手段）
例句：We need to court that big investor by hook or by crook, so shameless flattery is a fine place to start!
He would have to see her again by hook or by crook.
He is determined to hang on to power by hook or by crook.
The most important thing at the moment is to get them back to work tomorrow by hook or by crook!
I'll get the work finished this week by hook or by crook.
3. 表述：double trouble
例句：My students have trouble with their pronunciation and with their fear of losing face. That's double trouble!