Fep
前端机,前端处理机,前端机
🏥 医学释义
聚四氟乙稀，特氟隆
🗣️ 情景例句
I'm sorry you can't come with us, Susan.
很遗憾你不能同我们一起去， Susan。
Don't worry about it.
别担心。
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。