This is the 975th most frequent Chinese word.
共有
"共有" means "shared" or "jointly owned."
In this sentence, '共有' is used to mean 'has a total of', denoting the total number of students in our class.
我们班共有三十名学生。
Our class has a total of thirty students.
Here, '共有' indicates the entirety or total number of branch offices owned by the company.
这家公司共有五个分支机构。
This company has a total of five branch offices.
In this case, '共有' is used to signify 'jointly own', describing sharing ownership of the book.