To move or walk about almost inaudibly .

放松脚步走几乎没有声响地移动或走。

Staring at the door , his voice came out almost inaudibly .

在门口盯着，他的声音出来几乎听不见。

" I think I 'm dying , " he whispered almost inaudibly .

我想我要死了，他几乎听不见地低声说。

Invisible under the stars , an ummanned american spy plane circled inaudibly over a stretch of dark landscape , transmitting grainy images back to the united states .

在星星的掩映下，美国的一架无人驾驶侦察机悄无声息地盘旋在夜空中，向美国传回颗粒状图像。