For junior-high students, it should be "no more than an hour and a half", and two for high school students.

对于初中生而言应该是“不超过一个半小时”，对于高中生则应该是两个小时。

youdao

Thus the research on how teachers and students use the two sets of junior high school mathematics textbooks having big influence seems to be very necessary, and also very valuable.

因而，对于在教学中教师和学生如何使用这两种有着较大影响的初中数学教材进行调查研究就显得非常必要，也很有价值。

youdao

I take into account the junior high school two completely different lessons in dealing with the relationship between teachers and students need to be aware of the distinction.

而我兼顾小学初中两门完全不同的功课，在处理师生关系时就要注意区别对待了。

youdao

For most of them,everything's rosy. Once dismissed as lowly junior colleges and commuter schools in urban areas where students could walk or take public transit to class, these two-year colleges are attracting tens of thousands of students who would normally enroll in four-year private or state universities.

VOA: standard.2009.12.14

If anything, the greatest advances in access have been to the benefit of lower-income and under-prepared students as there has been a proliferation of high quality two-year junior and community colleges that cater to such students.

ECONOMIST: Trade and Central America