For imperfect crystals with point defects, the cluster method and the supercell simulation are two methods in common use.
对含有点缺陷的不完整晶体，通常使用原子簇方法或超原胞模拟计算方法。
From the point of view of technological aesthetics, the common method and principle on surface colour design of agricultural machine product is discussed in this paper.
本文从技术美学的观点论述了农机产品外观色彩设计的一般方法与规律。
General situation of automobile body design in common method, and emphatically point out optimize the way of automobile body decorate, reliability and so on.
介绍汽车车身设计的一系列方法，并着重对车身内外饰的优化、可靠性等方面进行分析。
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