Alkynes
[化] 炔烃
🗣️ 情景例句
That's true.
正是如此。
Thanks for coming to help on such a short notice.
谢谢你临时来帮忙。
No, not very. You need a driving permit. Have you got one?
不，不很贵。你需要一个驾驶执照。你有没有？