non-compulsoryBNC⁹¹⁵¹⁷⁺⁸ 基本例句 非强制性的非必修的 During this period, the curriculum setup in middle schools was continuously adjusted, which was best reflected by the systems such as the department instruction and non-compulsory course system. 这一时期中学教育的课程设置不断变化，主要体现在中学的分科教学、选科制与学分制等方面。 cnki