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
In view of our longstanding business relationship, we can conclude the transaction.
鉴于你我双方的长期贸易关系，我们可以做成这笔交易。
It was after dark when we got back,and we were all tired.
我们回来时天已经黑了，并且我们都很疲倦。
You don't have many apples, Jim, says Li Lei.
“你的苹果不多，吉姆，”李垒说