求翻译：对教材进行补充或取舍时，不应该影响教材的完整性和系统性。要避免为了考试而随意对教材内容进行调整;如有可能，应尽量与学生一起协商补充或取舍内容。是什么意思？

Teaching materials to supplement or a choice, should not affect the integrity and systematic textbooks. To avoid to be adjusted for the exams, free teaching materials; if possible, should try to consult with students to supplement or to choose content.

The materials are added or when trade-offs, and should not affect the integrity and teaching system. You want to avoid in order to test the content of textbooks and casual; if possible, you should try to consult with students or trade-offs.

Carries on the supplement or the choices when to the teaching material, should not affect the teaching material the integrity and the systematic characteristic.But must avoid in order to taking a test at will carries on the adjustment to the teaching material content; If has the possibility, should

To complement the textbook, or when you choose, should not affect the integrity of the teaching material and systemic. Free teaching materials to avoid in order to test adjustment; if possible, you should try to add or choose in consultation with students.

正在翻译，请等待...