The mad dog was foaming at the mouth.

疯狗口。

He stood there foaming at the mouth. I’ve never seen anybody so angry.

他站在那儿大发雷霆，我还从没见过有人生这大气的。

He is foaming at the mouth about the committee's decision.

他正为委员会的决定大发其火。

He looked like a madman, foaming at the mouth.

他口, 上去像个疯子。