1. A rabbit ran into the underbrush.
    一只兔子跑进了矮树丛。

1. 小试：underbed 底架 | underbrush 小试 | undercoat 底漆

2. 丛林：underbred 没教养的 | underbrush 丛林 | underbuild 建筑于下面

3. 草丛：under 在下 | underbrush 草丛 | undergo 经历

4. 林下灌丛：underbright 水平线附近云隙中射出 | underbrush 林下灌丛 | underbunching 电子聚束不足

1. （森林里林木下的）下层灌丛，灌木丛
    Underbrush consists of bushes and plants growing close together under trees in a forest.

    e.g. ...the cool underbrush of the rain forest...
           雨林里使人感到凉爽的下层灌丛
    e.g. The trail was steep and thick with underbrush.
           那条小路非常陡峭，而且长满了灌木丛。

1. the brush (small trees and bushes and ferns etc.) growing beneath taller trees in a wood or forest

    Synonym: undergrowthunderwood