Epoxybutane
氧化丁烯
🗣️ 情景例句
Good. Thank you. I'll be right down.
好，谢谢你。我马上下来。
Do you live down the street?
你在街尾居住吗？
Thank you. You watched the match, didn't you?
谢谢你。你看了比赛，对吧？