Concaving
v. 凹的( concave的现在分词 ); 凹地; 凹面, 成凹形
🗣️ 情景例句
I've never seen you so wound up.
我从来没有看过你这么紧张。
Some of them are mine.
一部分是我的。
Don't touch anything unless your teacher tells you to.
除非老师允许，否则你不要动任何东西。