上元是我的孙子，他是一名中学生。

Shangyuan is my grandson; he is a middle school student.

youdao

吴东是一名中学生，他今年13岁。

Wudong, who is 13 years old, is a middle-school student.

youdao

李海是一名中学生，去年他成为了一名志愿者。

Li Hai is a middle school students. Last year he became a volunteer.

youdao

李海是一名中学生，去年他成为了一名志愿者。

Li Hai is a middle school students. Last year he became a volunteer.

youdao