Naphthonitrile
萘甲腈
🗣️ 情景例句
What would you like to see me about?
你找我什么贵事？
Yay team!
加油！
Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor.
假定把一支笔拴在重物上，笔尖落在地板上的一张纸上，