Large classes dilute the quality of education that children receive.

大班上课会降低孩子所受教育的质量。

《牛津词典》

Classes in lab safety and quality control will also be required.

同时需要在安全和质量受控制的实验室进行课程学习。

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To further improve the quality of classes to expand the organization system;

进一步健全班级素质拓展组织体系；

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To further improve the quality of classes to expand the organization system;

进一步健全班级素质拓展组织体系；

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