Cdsc
[医][=Communicable Disease Surveillance Center]传染病监视中心
🗣️ 情景例句
Is this where I get my parcels?
这里是我取包裹的地方吗？
Don't answer back.
不要顶嘴。
So the number of stars that we know exist is now estimated at about 300 million million million.
因此，我们所知道的现有恒星数目估计约有30亿×1000亿颗。