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
I heard through the grapevine that the minister is going to resign.
我听到小道消息，首相将辞职。
I asked him to clean it for me, but he wouldn't.
我请他帮我清理，但是他不肯。
All my best memories come back clearly to me, some can even make me cry.
所有美好的记忆又在我脑海清晰地浮现了，有些甚至还令我哭泣。