Setbacks
周折
🗣️ 情景例句
What was that?
你说什么？
I read the newspaper over breakfast.
我边吃早饭边看报纸。
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。