Naphthenone
环烷酮
🗣️ 情景例句
Michigan has a fine School of Journalism. Michigan
大学有一个很好的新闻学院。
Why are you so sad?
你为什么这样伤心？
You'd better not go inside. There might be snakes.
你最好不要进去。说不定有蛇呢。