Reflection on a complex task such as teaching is not easy.
对教学这样一种复杂的任务进行反思是不容易的。
Improving teaching quality is a most important task for higher education. In-class teaching quality has a direct effect on the level of teaching quality.
提高教学质量是高等学校最重要的工作，课堂教学质量直接决定着教学质量的水平。
Police tactics is a comprehensive, flexible and practical program. It is an arduous task to carry on police tactics teaching and training.
警察战术是一门综合性、操作性、实战性很强的项目，搞好和实施警察战术教学与训练也是一项比较复杂的繁重任务。
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