锤子敲击金属的撞击声在车间里回荡。

The ___percussion of the hammer hitting metal echoed through the workshop.

学校乐队需要更多的打击乐器，比如铃鼓和三角铁。

The school band needs more ___percussion, like tambourines and triangles.

公司裁员的负面效应逐渐显现出来。

The negative ___repercussions of the company layoffs are becoming apparent.