Centrage
[医] [折射]中心线
🗣️ 情景例句
What's the problem, Richard?
有什么问题吗 Richard
Opportunity only knocks once.
机不可失，时不再来。
The children were running to move the bag of rice when they heard the sound of a motorbike.
孩子们跑去搬那包大米，这时他们听到摩托车的声音。