Introduction to Materials 材料概论
Introduction of main materials 主要材料介绍 ; 介绍的主要材料 ; 主要材质介绍
Introduction of spraying materials 常用喷涂材料介绍
Introduction to Materials Science 材料科学导论
Introduction of Materials Engineering 材料工程导论
Introduction of teaching materials 引进教材
Introduction to aerospace materials 航空航天材料导论
Mr. Hao declined to provide a date for the introduction of a national incentive policy for energy-efficient construction materials and did not specify what materials would qualify.
郝先生拒绝提供实施高能效建筑材料国家激励政策的具体日期，也没有详细列出有资格享受激励政策的具体材料。
The paper should include introduction, materials, methods, results, and discussion for each experiment, as well as a final discussion of the significance of the three experiments together.
这篇论文应该包括每个实验的介绍、材料、方法、结果和讨论，还要有一个最后的讨论，综合这三个实验的重要性。
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