n.按钮,电钮;纽扣,扣子;扣状物;[植]芽;
vt.用纽扣扣紧;用纽扣装饰,钉钮扣于;在…上装钮扣;
vi.扣住;装有钮扣;扣上钮扣;
例句:
A button has come off my coat.
我的上衣掉了一个扣子.
The effect of pushing the button is the same no matter who does it.
不论是什么人去按电钮,其效果都是一样的.
A button is off his coat.
他的上衣的一个扣子掉了.