Fluorobutane
丁基氟, 1-氟代丁烷
🗣️ 情景例句
I'm sorry you have to leave so soon.
很遗憾你不能多呆会儿。
You have to change at chicago station.
你必须要在芝加哥站转车。
you're likely to get five different answers, --
你很可能得到5种不同的答复，