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
Where are the shopping carts?
购物车在哪儿？
How are you?
你好吗？
Here are the two originals of the contract we prepared.
这是我们准备好的两份合同正本。