There was a lowering sky overhead, sloppy ground under foot, and a winter chill in the air.

头顶上是低沉的天空，脚下是泥泞的地面，空气中弥漫着冬日的寒意。

They trod their enemies under foot.

他们把敌人踩在脚下。

The ground feels crunchy under foot.

脚下的土地给人以松软的感觉。

We found it very slippery under foot.

我们感到地上很滑。

These chances are always "under foot."

这些机会总是“在脚下”。