The narrow crack down which it had come opened into the bottom lands.

它所穿过的狭窄裂缝通向洼地。

But the bottom lands were wide.

但是洼地很宽。

And there's the long view down the road to the river, across the cotton fields, and the mist rising from the bottom lands in the twilight.

从大路到河边，中间是一起宽广的棉田，前面是辽阔的远景，黄昏时夜雾从低洼处升起，周围渐渐朦胧起来。

But they could see only the space above the bottom lands, with a few tree-tops in it, and the distant tops of the earthen bluffs under the High Prairie's grasses.

但他们只能看到洼地上方的空间，里面有一些树梢， 还有远处高原草丛下的土崖顶部。

After making nearly a semicircle around the pond, they diverged from the water-course, and began to ascend to the level of a slight elevation in that bottom land, over which they journeyed.

绕着池塘转了将近半圆之后，他们离开了水道，开始上升到他们所经过的洼地的一个略高的高度。