原始人类居住在山洞里，使用简单的工具。

___Primitive man lived in caves and used simple tools.

原始社会没有文字语言。

___Primitive societies did not have a written language.

如今的年轻人更多地接触世界新闻，而原始社会则相当孤立，与外界毫无联系。

Young people nowadays are more exposed to world news, whereas ___primitive societies were rather isolated and had nothing to do with the outside world.