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
We really enjoyed your company.
我们喜欢与你为伴。
Do you have a passport?
你有护照吗？
The men were now obliged to try once more.
工人们只得再来一次。