求翻译：多媒体手段的运用是为教学服务的，其目的是为了实现教学过程最优化，更好地完成教学任务，提高教学质量和教学效率，那么它的运用就应当遵循以下三条原则是什么意思？

Use of multimedia tools for teaching services to the optimization of the teaching process, to better accomplish the task of teaching, improve teaching quality and efficiency, and its use on the following three principles should be followed

The multi-media tools for use in the Teaching Service is, and its purpose is to achieve the most optimized process of teaching, and better teaching tasks completed and to improve the quality of teaching and Teaching Effectiveness, then it should be guided by the following 3 principles

The multimedia method utilization is serves for the teaching, its goal is in order to realize the teaching process optimization, completes the teaching task well, improves the quality of teaching and the teaching efficiency, then its utilization must follow following three principles

Use of multimedia tools for teaching services, the purpose of which is the realization of the teaching process optimization, better teaching, improve the teaching quality and efficiency, then its use should be guided by the following three principles

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