scratch the surface
US /skrætʃ ðə ˈsɜːrfɪs/
UK /skrætʃ ðə ˈsɜːrfɪs/
1.
触及皮毛, 浅尝辄止
to deal with only a very small part of a subject or problem
:
•
We've only begun to scratch the surface of this complex issue.
我们才刚刚开始触及这个复杂问题的皮毛。
•
There's so much more to learn; we've barely scratched the surface.
还有很多东西要学；我们才刚刚触及皮毛。