他的手心里有一些小凹坑。

There are small ___hollows in the palms of his hands.

这块木头中间有一些空洞，可能是被虫蛀的。

There are several ___hollows in this piece of wood, probably caused by insects.

清晨的薄雾笼罩着山间的小山谷。

The morning mist covered the small ___hollows between the hills.