Ethynylation
炔化, 乙炔化作用
🗣️ 情景例句
I can't believe this is really happening!
我不敢相信这一切真的发生了
What's this?
这是什么？
This was followed, at the end of the 1970s, by a machine called an Apple.
70年代末，在牛郎星之后又出现了一种被称为“苹果”的机型。