"We are together" 或 "We are in a relationship" 都可以用来表示两个人在一起。
"We are together" 是一个常用的短语，源自英语中的 “to be together”，意思是两个人在一起，可以用来描述两个人在一起的关系。
例句：
We are together for a long time now.
They are together for the rest of their pves.
"We are in a relationship" 是一个更正式的说法，源自英语中的 “to be in a relationship”，意思是两个人在一段关系中。
例句：
We are in a relationship for more than two years.
They are in a serious relationship.