1.略懂皮毛, 不夠介入研究High school students have only scratched the surface of their subjects, and even college graduates find that they still have a lot to learn. 中學生對他們的課程只懂一點皮毛。即使大學畢業的大學生們仍發現他們還有許多東西要學習。This essay is so short that it can only scratch the surface of the topic. 這篇文章很短, 只能對這一問題作膚淺的探討。
觸及……的表面；對……作膚淺的探討，對……淺嘗即止I think your treatise only scratched the surface of the problem, and did not delve into its core. 我認為你的長篇大論只抓到了問題的皮毛，沒有觸碰到問題的核心。
觸及……的表面；對……作膚淺的探討，對……淺嘗即止I think your treatise only scratched the surface of the problem, and did not delve into its core. 我認為你的長篇大論只抓到了問題的皮毛，沒有觸碰到問題的核心。
