An approach based on the graph theory is used to study the relationship between molar refractions of silane and its molecular structure for the first time in this paper.
本文首次用图论方法探讨了硅烷的摩尔折射度与其分子结构之间的关系，提出一个结构基础明确的定量关系。
In order to get the stable structure of molecule, we have used the molecular orbit theory, which is introduced in second chapter we introduce this theory.
为了比较严格的得到一个分于的稳定结构，我们用到了分子轨道理论，第二谷章介绍了这一理论。
Impact of composition upon the cold flow properties for biodiesel was investigated by molecular structure, solution crystallization theory and similarity-intermiscibility theory.
在分析生物柴油分子结构的基础上，应用色-质联用仪、低温性能测试仪、溶液结晶原理和相似相溶原理研究生物柴油的低温流动性。
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