Their replies were no more than grunts of acknowledgement.

他们的回答不过是表示感谢的咕哝声。

He grunts an' frets a good bit when he's bein' settled into his chair.

当他被抱到轮椅上的时候，他会生气地抱怨半天。

Only a few grunts here and there.

只能偶尔咕噜一些语句。

A renegate hog grunts in the undergrowth.

一只野猪在灌木丛中咕哝。

He spoke in a series of grunts and hisses.

他说出一连串的咕噜和嘶嘶声。