Whereases
正式文件的开场白, 前言
🗣️ 情景例句
Apply as much force as is necessary.
需用多少力量就用多少。
Don't be anxious if I'm late.
如果我回来晚些也不必担忧。
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。