简立方晶体中的计算对晶体作了各向同性近似，虽然各向同性数学计算简单，并且可以得到一些有用的结果，但得到的结果仅仅数值表达式，不能反映其物理本质。
The approximation of isotropy was considered in simple cubic which makes the mathematics be simple, but the result is only described by number which doesn't reflect essence in physic.
简立方晶体中的计算对晶体作了各向同性近似，虽然各向同性数学计算简单，并且可以得到一些有用的结果，但得到的结果仅仅数值表达式，不能反映其物理本质。
The approximation of isotropy was considered in simple cubic which makes the mathematics be simple, but the result is only described by number which doesn't reflect essence in physic.
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