button

/ˈbətən/

a round fastener sewn to shirts and coats etc to fit through buttonholes

中文释义：纽扣；按钮

He sewed a button back onto his shirt after it fell off.

纽扣掉落后，他把它重新缝在衬衫上。

Press the button to start the machine.

按下按钮启动机器。