less important than related things次要的
developing from something similar that existed earlier继发的;间接的
B1 [ before noun ] mainly UK relating to the education of children approximately between the ages of 11 and 18 years old中学的
More examples
It takes a year to do a PGCE and then you can teach in a primary or secondary school.
This course qualifies you to teach in any secondary school.
Emily will be starting secondary school this year.
In some countries secondary education is not universally available.
The last ten years have seen a transformation in secondary education.
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