我很微弱地说了句“对不起”，感到特别尴尬。

I said "Sorry," very feebly, feeling rather embarrassed.

《柯林斯英汉双解大词典》

科尔坐在轮椅里，说话声音很微弱。

Sitting in his wheelchair, Kohl spoke in a faint voice.

youdao

离子发动机只发出很微弱的震动。

Ion engines give a pretty feeble kick.

youdao

In "Mowing," the scythe makes a sound as it cuts, and that sound is delicate, it's quiet, it whispers.

在“割草“中镰刀割草时发出声响，这个声音很微弱，安静，像低声细语。

耶鲁公开课 - 现代诗歌课程节选

Suddenly they do the Doppler effect where they turn their backs to you, in a way, and they're marching away from you and you hear very little sound.

突然,他们也产生了多普勒效应,当他们转身背对你时,当他们背离你前进时,你会听到一种很微弱的声音

耶鲁公开课 - 聆听音乐课程节选