Paleolithic period

• 旧石器时代

Paleolithic period的用法和样例：

例句

1. The stone balls were tools of hunting in Paleolithic times.
   石球是旧石器时代原始人用来狩猎的工具。
2. The soil is a mix of slate and quartz that dates back to the Paleolithic era.
   是一种由页岩和石英混合而成，源于旧石器时代。