There is Art and Labor course in primary school. Teachers and students could do it during these classes and it takes account of both main subject and subsidiary courses.
小学课程中有美术课和劳技课，可以请同学们和老师在这两门课的时间里自己动手做教学用具，即上好了辅科又对主课有帮助。
Of course between each pair of minima there will have to be a subsidiary maximum .
当然在每一对极小之间必定有一个辅极大。
Of course between each pair of minima there will have to be a subsidiary maximum.
当然在每一对极小之间必定有一个辅极大。
Of course between each pair of minima there will have to be a subsidiary maximum.
当然在每一对极小之间必定有一个辅极大。
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