Rollman
n. 滚轧机操纵者
🗣️ 情景例句
What is it?
那是什么？
I asked him to pay, but he wouldn't.
我请他付账，但是他不肯。
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。