“小孔”造句

用颜色相配的木质填料填平小孔。
Fill small holes with wood filler in a matching colour.

那种酸在晶体表面蚀刻出一些小孔。
The acid etched holes in the crystal surface.

一小滴水银滴进了这个小孔.
Into this aperture a droplet of mercury was poured.