Nitronaphthalin
[医] 硝基萘
🗣️ 情景例句
Is room service available?
有房间服务吗？
When you're learning to drive, having a good teacher makes all the difference.
初学驾驶有好的教师指导，差别很大。
No. Where's Jim? asked Ann.
“没有。吉姆在哪儿？”安问。