Naphthenone
环烷酮
🗣️ 情景例句
Well, all your things are inside.
嗯 ，所有的东西都拿进来了。
Try not to be so timid when you speak.
你讲话的时候不要那么紧张。
I'm afraid he's out. He won't be back until tomorrow.
对不起，他外出去了，明天才回来。