🗣️ 情景例句
What's your major?
你是什么专业的？
One man's meat is another man's poison.
一个人的佳肴常为另一人的毒药。
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。