"这太荒谬了，"她小声嘀咕道。

"This is ridiculous," she whispered ___under ___her ___breath.

"我想我们迷路了，"他一直小声嘀咕着。

"I think we're lost," he kept muttering ___under ___his ___breath.

当他意识到自己的错误时，他小声咒骂了一句。

He cursed ___under ___his ___breath when he realized his mistake.