they的意思是什麼

例句：

They won by a single goal after extra time.

他們在加時賽中僅踢進一球即獲勝。

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

他們在研究如何改進人們飲食。

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

只要為人正直，別人就會尊敬你。