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
He told me
他告诉我
The outsideer sees the best (or most) of the game.
旁观者清。
During this time, they will give five performances.
在此期间，他们将演出5场。