Olefins
n. 烯烃; 链烯
🗣️ 情景例句
I'm not letting you get behind the wheel until you've sobered up.
除非你完全清醒了我才会让你开车。
The plane has crashed.
飞机失事了。
Why do you keep asking me the same question?
你怎么又问我同样的问题？