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
Has poor scholastic record, just got by.
学习成功不够好，仅仅过得去而已。
Curzon Street? Isn't Mary living there?
可胜街？玛丽不是也住那儿吗？
They are often more industrious, useful citizens than those who are never late.
他们与那些从不迟到的人相比，常常是更勤奋有用的公民。