William went away muttering to himself.

威廉喃喃自语地走了。

She was staring into the fire muttering, and holding her arms outstretched to warm her hands.

她凝视着那火，喃喃自语着，伸出双臂暖手。

He continued walking back and forth, muttering to himself; he had forgotten the King entirely.

他不断地走来走去，喃喃自语；他完全忘记了国王。

She just sat there muttering to herself.

她坐在那儿独自唧唧咕咕的。

He heard muttering from the front of the crowd.

他听到人群前面传来喃喃低语。