Polybromocarbon
多溴烃
🗣️ 情景例句
How long will this letter take to get there?
这封信需要多长时间到那儿？
Yes, I worked from early morning until late at night.
是,我从清早工作直到半夜。
May I? Thanks. Oh, this one is nicer than the other one. What's in it?
可以吗？谢谢。噢，这个比那个更好点儿。里面放的是什么？