I could hear an animal scuttling about in the undergrowth.

我可以听到一只动物在中跑来跑去。

They pushed their way through the undergrowth.

他们在中开路前进。

A movement caught his eye in the tangled undergrowth.

乱里的晃动引起了他的注意。

There was a rustle in the undergrowth behind her.

她身后的低发出一阵沙沙声。

We had to chop a way through the undergrowth.

我们必须在林中砍伐出一条路来。

The undergrowth was so thick that we had to file our way through it.

下层太密, 我们只得成纵队行进。