Caesium
[医] 铯(55号元素)
✅ 同义词
🗣️ 情景例句
And that's what I did.
我也这样做的。
Nothing will come of nothing.
无风不起浪。
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。