Convexoconvex
[醫] 對凸的, 雙凸的
??? 情景例句
What was your graduation thesis on?
你畢業論文是什么題目？
If you want my advice,I don't think you should go.
如果你想要我的忠告，我不認為你應該去。
Who's this?
這是誰？