Olefination
烯化作用, 成烯作用
🗣️ 情景例句
It's a privilege to know you.
认识您是我的荣幸。
Would you please have dinner ready for me?
可以请你为我准备晚餐吗？
I know that one of the towers is on the top of a hill, but the rest of the buildings are easy to get to.
我知道其中有个塔在山上，但其余的建筑物都并不难上。