People
persons, human beings 人们（集体名词）
1. There were a lot of people at the party.
有许多人参加了聚会。
2. Some elder people enjoy Beijing opera immensely.
有些上了年纪的人非常喜爱京剧。
3. Quite a few people came to the lecture.
有相当多的人来听讲。
all the persons who live in a particular place or belong to a particular country, race, etc 生活在某一国家或某一地区的人民；民族
1. The friendly exchanges between the Chinese and American peoples date back more than two hundred years.
中美两国人民的友好交往，已有二百多年历史。
2. There are fifty-six peoples in China.
中国有五十六个民族。
Person
a human as an individual 人（强调个人）
1. Youre just the person I want to see.
你正是我想要见的人。
2. What is she like as a person?
她的人品怎么样？
3. A selfish person always thinks about himself.
一个自私的人总是想着自己。
【注意】
1. people表示人们时，为集体名词，不能表示个人。people表示民族时，为可数名词，有单复数形式。
2. person是可数名词，强调个人，其复数形式为persons，不过人们习惯用people代替persons。