选择这样几组晶面，使它们的密勒指数较低且具有对称性。

Those crystal planes should be selected such that their Miller indices are lower and the planes have high symmetry.

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采用晶格变换的方法证明了在底心单斜格子中密勒指数与晶面间距的关系式。

In this paper, a method of lattice transformation is introduced to demonstrate the relational expression between Miller indices and interplanar spacing in base-centered monoclinic lattice.

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他认为，在生产率增加还比较平缓(指数曲线的做下部分)的当时，勒德主义的确是个谬论。

In his view, Luddism was, indeed, a fallacy when productivity improvements were still on the relatively flat, or slowly rising, part of the exponential curve.

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