button one's lip

(informal)stop or refrain from talking

(非正式)不吭聲，住嘴

press the button

(informal)initiate an action or train of events (often used to refer to the ease with which a nuclear war might be started)

(非正式)發(fā)動(dòng)（事件）（常用來(lái)形容發(fā)動(dòng)核戰(zhàn)爭(zhēng)多么容易）

push (或 press) someone's buttons

(informal)arouse or provoke a reaction of someone

(非正式)引起反應(yīng)

don't allow co-workers to push your buttons.

別讓你的同事牽著你的鼻子走。

button something up

(informal)complete or conclude something satisfactorily

(非正式)圓滿結(jié)束

trying to button up a deal.

試圖做成一筆交易。

[often as adj. buttoned]repress or contain something

壓制（或控制）的

it was repressive enough to keep public opinion buttoned up.

彈壓民意真是太專制了。

on the button

Exactly; precisely.

準(zhǔn)確；確切