Purities
(purity 的复数) n. 纯净, 纯正, 纯粹\\n[化] 纯度
🗣️ 情景例句
Can I call you sometime?
我能给你打电话吗？
I cannot believe that.
我还是不敢相信。
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。