复数： thicknesses

Here l is the thickness of the bubble wrap .

此处的l是指汽泡纸的厚度。

No. shaving hair doesn 't change its thickness or color .

不，毛发刮后并不会改变的粗细和颜色。

The thickness of the undergrowth forced him to draw nearer to them .

树丛的密度迫使他不得不走近他们。

The extra thickness was barely discernible .

增加的厚度几乎感觉不出来。

Facial tissue thickness charts give guidelines but every person is an individual .

面部组织厚度的轮廓图提供了指引，但每个人都是一个独立的个体。