You use those to refer to people or things which have already been mentioned.
双语例句
例：
Witnesses said that two people were killed, but those accounts could not be confirmed.
目击者说两人遇害，但那些说法都没法得到证实。
2.?（指在空间或时间上离说话者稍远的人或物）那些
You use those when you are referring to people or things that are a distance away from you in position or time, especially when you indicate or point to them.
双语例句
例：
What are those buildings?
那些建筑物是什么？
3.?（指将要详细谈到的人或物）那些
You use those to refer to someone or something when you are going to give details or information about them.
双语例句
例：
Those people who took up weapons to defend themselves are political prisoners.
那些拿起武器自卫的人是些政治犯。
4.?（指双方均了解的人或事物）那些
You use those when you refer to things that you expect the person you are talking to to know about or when you are checking that you are both thinking of the same people or things.
双语例句
例：
He did buy me those daffodils a week or so ago.
他确实在大约一周前给我买了那些水仙花。
PRON. 代词
1.?那些
You use those to refer to people or things which have already been mentioned.
双语例句
例：
I understand that there are a number of projects going on. Could you tell us a little bit about those?
我知道有一些项目正在进行之中。你能给我们简单说说那些项目吗？
2.?那些
You use those when you are referring to people or things that are a distance away from you in position or time, especially when you indicate or point to them.
双语例句
例：
I like these but not those.
我喜欢这些，而不是那些。
例：
Those are nice shoes. Where'd you get them?
那些鞋子很不错。你在哪儿买的？
3.?（对已提及事物作补充说明以免重复）那些
You use those to introduce more information about something already mentioned, instead of repeating the noun which refers to it.
双语例句
例：
The interests he is most likely to enjoy will be those which enable him to show off himself or his talents.
他最有可能感兴趣的，是那些能让他自我炫耀或卖弄才华的事情。
4.?人们
You use those to mean 'people'.
双语例句
例：
A little selfish behaviour is unlikely to cause real damage to those around us.