n.厚度；浓度；层

The beam has a thickness of 3 inches. 这根梁厚3英寸。

The hole size is limited by the ring thickness. 螺孔的大小受套圈厚度的限制。

The film thickness cannot exceed a maximum value which depends on the Ge content. 薄膜的膜厚不可以超过由锗浓度所决定的最大数值。

I wrapped the ice cream in three thicknesses of newspaper to keep it cool. 我用三层报纸包裹冰淇淋使其不致变热融化。