坑洞

The district is pock-marked with caves.

这个地区布满了坑洞。

Whoa! Watch out for that hole in the sidewalk!

哇呜！ 小心人行道上的坑洞！

Many common minerals, such as feldspar, develop microscopic pits during weathering.

许多常见矿物（例如长石）会在风化过程中发展出微小坑洞。

The engineers tested smooth, porous and textured concrete surfaces with four tire designs.

工程师在各种表面，包括光滑的 、 多坑洞及特定结构的混凝土路面，测试了四种不同的轮胎。

The huge potholes and rocks in the road stopped the car dead in its tracks.

路上巨大的坑洞与岩石阻止车子往前进。