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
He likes to be independent.
他独立性很强。
They won't listen, so don't waste your breath telling them.
他们听不进去，不必和他们多费口舌了。
Hi! I'm sorry I was out when you rang.
你好！我很抱歉，你打电话时我出去了。