(of a person) never thinking about things that are serious or important

He's fun to be with, but he's very superficial. 和他在一起很有趣，但是他见识很肤浅。

not complete and involving only the most obvious things

I thought that article was written at a very superficial level. 我认为那篇文章写得很肤浅。

The documentary's treatment/analysis of the issues was very superficial. 这部纪录片对这个问题的处理／分析非常肤浅。

I only have a superficial (= slight) knowledge of French. 我对法语只是略知皮毛。

appearing to be real or important when this is not true or correct

There are superficial similarities between the two cars, but really they're very different in terms of performance. 这两辆汽车表面上虽然相似，但事实上它们的性能相去甚远。

only on the surface of something

superficial damage 表面损伤

The driver only received superficial injuries/cuts/wounds. 司机只受了点皮外伤。