Prelithic
a. (人类进化中)石器使用前的
🗣️ 情景例句
Come on, Richard. Get up. Let's go.
好啦 Richard。起来。走吧。
Would you mind getting together sometime?
你可以找个时间大家一起聚聚吗？
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。