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
Oh, this is amazing! How can you people handle so many festivals?
哇，不是吧！你们怎么可能应付这么多的节日？
Nothing is more precious than time.
世上最宝贵的莫过于光阴。
I've got good news.
我有好消息告诉你。