Hydrogens
(hydrogen 的复数) n. 氢\\n[化] 氢H-2
🗣️ 情景例句
In those days, when they made quilts.
那个时代 ，人们做被罩时，
How long has he been with that company?
他在那家公司多久了？
We'll see his boat and then we'll say goodbye to him.
我们将参观他的船，然后和他告别。