Concavo-concave
a. 两凹的, 两面凹洼的\\n[建] 两面凹的
🧩 词语组成解析
concave
['kɔn'keiv]
n. 凹面，成凹形;
adj. 凹的;
vt. 使成凹形;
🗣️ 情景例句
Well, we could tell her
嗯，我们可以告诉她
I learned history last month.
我上个月学历史。
That sounds interesting. That was a hundred years ago, wasn't it?
听起来很有意思。那是一百年前的事了，不是吗？