Execute process of product development including design, analysis, material selection, evaluation and qualification to meet standards.

执行产品开发过程，包括：设计、分析、材料选择、评估以及符合标准的资格。

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The author initially reviews some relevant theoretical principles—linguistic theories, language learning theories and syllabus theories for material evaluation and development respectively.

随后又对英语教材评估理论进行了综述并在此基础上设计了本次评估的框架模式。

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