这些耳塞可以减弱噪音。

These earplugs help to ___deaden the noise.

这些耳塞可以减弱建筑工地的噪音。

These earplugs ___deaden the noise from the construction site.

持续的批评让他对别人的意见变得麻木不仁。

Constant criticism has ___deadened his sensitivity to others' opinions.