求翻译：教师的工作对象是学生，所以学生的学业成绩是衡量教室工作的标准之一。但是学生有很大差异，学生成绩的好坏有师生双方面的原因是什么意思？

Work of teachers targeted at students, so students' academic performance is a measure of classroom work in the world. But the students are very different, their performance is good or bad reasons for both sides have students

The work of teachers targeted at students, students' academic performance is one of the criteria of measuring classroom work. But the students there were significant differences between teachers and students, the performance of their students, good or bad is the reason for double-side

Teacher's work object is a student, therefore student's academic achievement weighs one of classroom work standards.But the student has the very big difference, the student result quality has the teacher and student both sides surface reason

Object is a student of the teacher, so the students ' academic performance is one of the criteria to measure classroom work. But students have great differences, students ' performance is good or bad reasons for both teachers and students

Object is a student of the teacher, so the students ' academic performance is one of the criteria to measure classroom work. But students have great differences, students ' performance is good or bad reasons for both teachers and students