skin deep

基本解释

That beauty's only skin deep, that fashion creates unrealistic expectations, or that we're the chumps for buying into it?
美丽是肤浅的，时尚是不切实际的期待，还是我们只是一群替时尚买账的笨蛋？
In these circumstances, the politics of morality can seem little more than skin deep: essentially an electoral tactic, suitable for a moment when reform is not a plausible way to win votes.
在这种境地下，道德政治可能只会相当肤浅：基本上只是一种适合于改革不是争取选票的可行方式时期的竞选策略。
If the spot on his skin is white but does not appear to be more than skin deep and the hair in it has not turned white, the priest is to put the infected person in isolation for seven days.
若火斑在他肉皮上是白的，现象不深于皮，其上的毛也没有变白，祭司就要将有灾病的人关锁七天。

He is so close you can see his white ivory tusks and the deep lines in his gray skin.
These are very deep lesions that go not just on the surface of your skin like a blister would, but down into the dermis or deeper layers of the skins, as well.
这些伤非常深,它们不仅像水泡那样存在于皮肤表面,还深入到真皮层或者皮下更深的地方
耶鲁公开课 - 生物医学工程探索课程节选

We just have to remember that the meanings behind these tattoos are more than skin deep.
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In fact, as any reading of recent history that goes more then skin deep will immediately demonstrate, they are completely and utterly superfluous.
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Something that is only skin deep is not a major or important feature of something, although it may appear to be.