他按下按鈕開動了機器英文怎麼說？

He pushed a button and set the machine in motion.

我按電鈕把燈打開英文怎麼說？

I pushed the button to turn on the light.

他把襯衫最上面一顆鈕扣扣起來英文怎麼說？

He buttoned the top button of his shirt.

你上衣掉了一粒鈕扣英文怎麼說？

A button has come off your coat.

如果你按下第四個按鈕,螢光幕上將出現一個新的網絡英文怎麼說？

When you punch the fourth button, a new network will flash on the screen.