mouthing

1.He crept into the corner, mouthing curses.

他悄悄地移到角落，嘴里喃喃地诅咒着。

2.He was mouthing off about the high price of fish.

他就鱼价大发议论。

3.He was mouthing the usual platitudes about the need for more compassion.

他言不由衷地说些需要更同情之类陈腔滥调。