Classes
n. 级别, 阶级（class复数形式）
🗣️ 情景例句
I just can't seem to win tonight.
我今晚看起来是不能赢了。
All are brave when the enemy flies.
敌人逃跑时，个个都勇敢。
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。