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
You won't believe this.
你会觉得难以置信。
Sloth turneth the edge of wit.
懒惰会磨去才智的锋芒。
We're going to leave at about seven thirty next Monday morning.
我们打算下星期一早上7：30 左右出发。