v.含糊地说某事,叽咕,咕哝( mumble的现在分词 );
例句:
I couldn't hear what she said because she was mumbling.
我听不清她说些什么,因为她声音小而不清楚.
He was giving a speech, yet he was mumbling away to himself.
他在发言, 可却是在喃喃自语.
No wonder our bus driver is mumbling to himself.
难怪我们的公车司机一直喃喃自语.