Allylic
烯丙基的
🗣️ 情景例句
Thanks for all your hospitality.
谢谢你的感情招待。
When should I get to the airport?
我该在什么时8点45分之前到那里。
He acted as if he had never lived in England before.
他的举动就好像他从未在英国生活过一样。