Polyalkane
聚链烷
🗣️ 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 are you eating?
你正在吃什么？
I knew that experts from the local museum would soon visit the cave.
我知道本地博物馆的专家会很快到山洞来探访。