Quatenary carbon atom
[医] 第四碳原子, 季碳原子
🧩 词语组成解析
🗣️ 情景例句
If you cheat in a test, you've really only cheating yourself.
如果你在测验中作弊的话，你欺骗的只有你自己。
The telephone is ringing.
电话铃响了。
This product is doing very well in foreign countries.
这种产品在国外很畅销。