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She kept her eyes down but began mumbling something .

她不停下来，但她的眼睛开始喃喃自语的东西。

And then he left , mumbling something to himself .

然后他离开，喃喃对自己的东西。

The old man was mumbling his own boss .

这个老人在对自已老板咕哝。

I hear someone calling out and mumbling in pain .

我听见某人召集和嘟哝在痛苦中。

Well , why is she mumbling like that ?

嗯她怎么会像这样自言自语?