Concave mirror
凹镜
🧩 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'll try it.
我试试吧。
Make up your mind!
干脆点！
So far as I know you shouldn't have any problems there.
就我所知，你在那里不会有什么问题的。