The period of compulsory education, sixth grade, to set up environmental education into the curriculum of local management, each school year for not less than 12 hours.是什么意思_The period of compulsory education, sixth grade, to set up environmental education into the curriculum of local management, each school year for not less than 12 hours.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句