Ethynylation
炔化, 乙炔化作用
🗣️ 情景例句
That won't do.
这可不行。
She has always a gracious smile.
她脸上总是带着和蔼可亲的微笑。
No!We're alone here. We're all by ourselves, said Jim. Isn't that great?
“没有！就我们在这儿。就我们这伙人，”吉姆说，“这不是很好吗？”