Gales had scoured the summit to raw bedrock.

大风已经把这座成光秃秃的岩床。

And some of the lower rock beds--deep down in the canyon--look kind of tilted.

一些较低的岩床—— 在峡谷深处——看起来有点倾斜。

Surprisingly, sand dunes cover only about a sixth of this desert; the rest is made up of mountain ranges, gravel plains, salt flats, and rock beds.

令人惊讶的是，丘只覆盖了这片漠的六分之一左右；其余部分由山脉、砾石平原、盐滩和岩床组成。

We find them in fissures of rock miles beneath our feet, in boiling waters of the ocean floor, in acidic waters of thermal springs, and in cloud droplets miles above our heads.

在我们脚下的岩缝里，海底岩床的沸水中，地热温泉的酸性泉水中，我们头几英里上方滴落的雨水中。