The calculations of nematic order in liquid crystals with an external magnetic field are made based on the cell theory.

在格胞理论的基础上计算外磁场作用下液晶中的向列序。

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Under an external magnetic field, light waves in a magnetic fluid will produce the phenomenon of photic birefringence effect.

磁性液体是一种特殊的高分子稳定胶体，对外施磁场特别敏感。

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Through observation and calculation, it is found that weak flocculation of magnetic fluid in an external magnetic field is quite obvious.

通过实验观察和计算分析发现磁性液体在外施磁场下弱絮凝行为表现异常明显，又显示出特有的方向性。

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The coil is suspended in an external magnetic field and the current running through it adjusted so that the attraction between the two magnets balances the gravitational force on the suspended mass.

ECONOMIST: Weighing a kilogram