Quatenary carbon atom
[医] 第四碳原子, 季碳原子
🧩 词语组成解析
🗣️ 情景例句
We don't get to see enough of each other.
我们在一起的时间太少了。
Do you like skating?
你喜欢溜冰？
He say he's just arrived in Scotland. He says he's staying at a Youth Hostel.You know he's a member of the Y.H.A.
他说他刚到苏格兰。他说他住在一家青年招待所。你知道，他是“青招协”的一个成员。