求翻译：4>小组协作，讨论研究学生在自学之后必然会遇到自身难以解决的问题，这时便可以安排学生进行小组协作，共同讨论研究所遇到的困难。在此过程之中，要充分调动小组之中后进学生提出问题的主动性以及优秀学生乐于助人的积极性，做到小组之中只要有一人会，便没有一人不会，即“兵教兵”。如此以来，小组成员的组成便显得致关紧要了。因此，笔者借鉴了张思中老师分组教学的经验，将全班学生按成绩分成了ABC 三个系列，并按照AB式、AC式、BC式、ABC式等多种模式对全班学生进行了以学习小组为单位的座次调整，力争做到小组之间人员的平衡以增强小组之间竞争的公平性及积极性。是什么意思？

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The question which the 4> group's cooperation, the discussion studies the student after studies independently inevitably can meet oneself with difficulty to solve, by now then might arrange the student to carry on%2

4> team to discuss research students in the self-study will inevitably encounter after their difficult problems, then we can arrange for students to team collaboration, to discuss difficulties encountered by research. In this process, to fully mobilize the initiative and excellent group of backwa