Hexadiyne
[化] 己二炔
🗣️ 情景例句
I want to thank you for giving me an opportunity to speak to you.
我要感谢大家给我一个机会来向各位讲话。
A quiet conscience sleeps in thunder.
白日不做亏心事，夜半不怕鬼敲门。
At the same price?
价钱一样吗？