Methods The basic governing equations of quasicrystal elasticity theory and Gauss's theorem were applied in the derivation.
目的推广经典晶体弹性理论中的几个基本定理到准晶弹性理论中去。
METHODS: the theory of price elasticity in economics was applied for the analysis.
方法：运用经济学中的弹性理论进行分析。
METHODS: the theory of price elasticity in economics was applied for the analysis.
方法：运用经济学中的弹性理论进行分析。
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