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 wish I had her energy.
我希望我有她那样的精力。
All things are difficult before they are easy.
凡事都是先难后易。
Yes, it is. Thanks!
对，是我的。谢谢！