Concave point
[计] 凹点
🧩 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
It's my fault. I really feel bad about it.
是我的错。 我真的感到很难过。
It is never too late to mend.
亡羊补牢，犹为未晚。
You always know the right thing to say.
你说话得体。