Epoxybutane
氧化丁烯
🗣️ 情景例句
Scene: Tom and his wife have invited Carl and David for dinner.
场景：汤姆和他夫人邀请卡尔和大卫吃晚饭。
What's your trouble?
你有什么不舒服？
Before they were replaced by steamships,
在蒸汽船取代帆船之前。