作肤浅的探讨;浅尝辄止;隔靴搔痒
牛津电影里 100%
to deal with, understand, or find out about only a small part of a subject or problem
They scratch the surface and never think
And you're just starting to scratch the surface.
释义来自《牛津高阶英汉双解词典》第 9 版