Shouldst
conj.将会..., 万一...
🗣️ 情景例句
I'm late for dinner at my house.
我回家吃晚饭要迟到了。
She's an English-woman.
她是英国女人。
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。