Sector velocity
[化] 扇形速度
🧩 词语组成解析
🗣️ 情景例句
I had a million things to do today.
我今天有成千上万的事要做。
I'm afraid you will miss your train.
我怕你会错过火车。
So he took off the second shoe and put it under his bed very quietly.
他脱下第二只鞋子，轻轻地放在床下边。