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 am hungry.
我真是饿了。
Lucky bastard!
狗屎运！
That's why I've come to see you.
这就是我来见您的原因。