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
It's 5:05.
现在是五点零五分。
It's least valuable.
这最没有价值。
Good! Would you like another one?
好！你想再要一个吗？