数据正规化技术是为将数据正确地保存再各个标准，从而使数据冗余达到最小，存取速度达到最高。
The technique of data normalization is about correct ways of partitioning the data among tables to minimize data redundancy and maximize the speed of retrieval.
任务分析是使生物课堂教学设计走向科学化、系统化和正规化的一项重要的教学理论与技术。
This paper tries to discuss how to apply task analysis to biology teaching design in the middle school.
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