Dihydro-
二氢
🗣️ 情景例句
Mary, this is Stone's brother Jim.
玛丽，这是世通的兄弟吉姆。
As soon as she quit the room he returned to it.
她刚离开房间，他回来了。
The real dividing line between continents and oceans occurs at the foot of a steeper slope.
大陆和海洋的真正分界线是在陡坡脚大陆架慢坡