So this is a very clear outline.

所以这是一个非常清晰的提纲。

There was enough light in the sky for the clear outlines of bushes and trees to be visible.

天空中有足够的光线， 可以看到灌木和树木的清晰轮廓。

They crossed a shallow basin with the clear outline of gray sand spreading across it from a canyon opening to the south.

他们穿过一个浅浅的盆地，灰色沙子的清晰轮廓从南面的峡谷延伸到整个盆地。