这个班级由50个年龄从15到20岁的学生组成的翻译：This class is made up of 50 students aged from 15-20 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

This class consists of 50 ranged in age from 15 to 20 year-old student composition

This class is made up of 50 students aged from 15-20

This class and grade from composes from 50 ages 15 to 20 year-old student

This class comprises a group of 50 age from 15 to 20 -year-old student composition

This class is made up of 50 students aged from 15-20