they的意思是什么

they它是代词，意为它们；他们；她们。
用以代替he或she，指性别不详的人。

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。