Epoxybutane
氧化丁烯
🗣️ 情景例句
All right. Is...is Susan coming?
好吧， Susan来吗？
A mean boy teases the dog.
一个淘气的男孩在捉弄着狗。
Be careful. It's dangerous. You're too high.
小心。危险！你上得太高了！