they的意思是什么

　　例句：

　　They won by a single goal after extra time.

　　他们在加时赛中仅踢进一球即获胜。

　　They're researching into ways of improving people's diet.

　　他们在研究如何改进人们饮食。

　　They'll respect you as long as you play fair.

　　只要为人正直，别人就会尊敬你。