(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)發動（事件）（常用來形容發動核戰爭多么容易）
push (或 press) someone's buttons
(informal)arouse or provoke a reaction of someone(非正式)引起反應
button something up
(informal)complete or conclude something satisfactorily(非正式)圓滿結束[often as adj. buttoned]repress or contain something壓制（或控制）的
on the button
Exactly; precisely.準確；確切
英語六級真題
During commercials, an overlay will appear at the bottom of the screen, prompting viewers to press a button to request a free sample or order a catalogue.
出自-2016年6月閱讀原文
Yet once they start growing, such plants seem not to retain the ability to hit the pause button on metabolism in their stems or leaves.
2018年6月六級真題（第一套）閱讀 Section B
柯林斯高階英漢雙解學習詞典釋義
N-COUNT
紐扣；扣子
Buttons are small hard objects sewn on to shirts, coats, or other pieces of clothing. You fasten the clothing by pushing the buttons through holes called buttonholes.
A button is a small piece of metal or plastic which you wear in order to show that you support a particular movement, organization, or person. You fasten a button to your clothes with a pin.
PHRASE
（巧妙地）獲取想要的東西
If you say that someone presses the right button or pushes the right button, you mean that they get what they want from a particular situation or person by behaving in a clever way.