Boroethane
乙硼烷
🗣️ 情景例句
How many classes are you taking this semester?
这学期你有多少课？
That's a bad idea if I've ever heard one!
你出这什么馊主意！
By the end of next year, they will have finished work on the new stadium.
到明年年底，他们将把新体育场建成。