foam at (v.+prep.)
▲foam at the mouth
1.口吐白沫have bubbles forming at the lips, as in certain diseases
He looked like a madman, foaming at the mouth.他口吐白沫,看上去像个疯子。
2.大怒be very angry
He is foaming at the mouth about the committee's decision.他正为委员会的决定大发其火。

foam with (v.+prep.)
非常气愤be very angry
▲foam with rage
He is foaming with rage over some decisions.他正为一些决定生气。

用作不及物动词
▲S+～(+A)
Milk foamed into the pails.牛奶冒着泡沫注入桶中。
The beer foamed up and overflowed the glass.啤酒冒着泡沫,溢出了玻璃杯。

The glass of beer was mostly foam.这杯啤酒大部分是泡沫。
This is a foam product.这是一种泡沫产品。

［词源］＜拉丁语spuma(泡沫)