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
Where are they?
草图在哪儿？
Time does not bow to you,, you must bow to time.
必须抓紧时间。
Such as?
譬如说什么？