A speaker or writer uses we to refer both to himself or herself and to one or more other people as a group. You can use we before a noun to make it clear which group of people you are referring to.
双语例句
例：
We both swore we'd be friends ever after.
我们俩人都发誓从此以后永为朋友。
例：
We ordered another bottle of champagne.
我们又点了一瓶香槟酒。
2.?我们（泛指人们）
We is sometimes used to refer to people in general.
双语例句
例：
We need to take care of our bodies.
我们需要照顾好自己的身体。
3.?我们（作者或说话者使用，指读者或听众以及自己，尤其用于报告中或书中）
A speaker or writer may use we instead of 'I' in order to include the audience or reader in what they are saying, especially when discussing how a talk or book is organized.
双语例句
例：
We will now consider the raw materials from which the body derives energy.