Gantrees
提花机架
🗣️ 情景例句
and this is an important decision we have to make.
这又是我们必须做的一个重大决定。
To throw a plane
抛
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。