Nsca
[医][=National Society for Clean Air]全国空气净化学会
🗣️ 情景例句
They had some ideas about getting the place fixed up.
他们对于怎么样修复这个地方有些构想。
I used to take a walk in the early morning.
我过去常一大早出去散步。
Do you see that notice? It says No Camping -- in case you can't read!'
你们看到那个布告牌了吗？上面写着‘禁止野营’－－除非你们不识字！”