Spinales
[动]棘肌
🗣️ 情景例句
What, Harry?
什么 ，Harry？
Which one is more difficult?
哪一个是比较难的？
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。