patchy

1. ADJ A patchy substance or colour exists in some places but not in others, or is thick in some places and thin in others. 分布不均衡的

Thick patchy fog and irresponsible driving were to blame. 浓重的分布不均的雾和不负责任的驾驶应受到责难。

...the brown, patchy grass. …分布不均的棕色草地。

2. ADJ If something is patchy, it is not completely reliable or satisfactory because it is not always good. 不很可靠的; 不很令人满意的

The evidence is patchy. 这个证据不很可靠。