Nanoparticles
纳米粒
🗣️ 情景例句
You got that part right.
你们这一部份猜对了。
Did you tell him yourself?
你自己亲自告诉他吗？
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。