求翻译：　　指在12—17岁期间在中等学校接受教育的过程。初中、普通高中、职业高中和中专均属于中等学校。普通中学分为初中和高中，学制各为3年，初中毕业生一部分升入高中，一部分升入职业高中和中专。全国共有中等学校93968所，在校生9415.21万人。中等学校一般由地方政府兴办。是什么意思？

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　　Refers in the 12-17th period accepts the education in the middle school the process.The junior middle school, the ordinary high school, the professional high school and the specialized middle school belong to the middle school.The general-studies middle school divides into the junior middle school

　　Means 12-17 in secondary school during education process. High schools and secondary schools, vocational high schools and technical secondary school belong to the middle school. General secondary schools are divided into junior and senior high school, school system for 3 years, part of junior high