01.处事得当
play your cards right
02.
明哲保身,小心谨慎
play (it) safe
03.
玩火自焚
play with fire
04.
保持冷静
play it cool
05.
正中某人下怀
Play straight into someone's hands.
The policemen set up a trap to catch the thief, who played straight into their hands by falling for the trap right away.
警察设了一个陷阱来抓小偷,小偷立即落入了他们的手中。
If I play my cards right, I think I can get him to show up late to the test on purpose and play straight into my hands.
如果我办事得当的话,我想我可以故意让他在考试中迟到,这正合我意。