The need to communicate is a key characteristic of human society.

　　需要交流是人類社會最重要的一個特征。

　　They were discussing the problems of Western society.

　　當時他們正在討論西方社會的問題。

　　The police play a vital role in our society.

　　警察在我們的社會中起著極其重要的作用。

　　Our society is in a state of flux.

　　我們的社會在不斷演變。

　　Many young people no longer feel they have a stake in society.

　　很多年輕人不再覺得他們與社會休戚相關。