Superfacial velocity
[化] 表观速度
🧩 词语组成解析
🗣️ 情景例句
When was it built?
它是什么时候建造的？
We're having some friends over. What are you doing?
我们打算请几位朋友来玩。你打算干什么呢？
In the afternoon, classes are over at 3:30, and I get home at about 4:00.
下午三点半下课，我大概四点到家。