存储非普通空间的法向量，例如，正切空间。

Store normals in generic space, e. g. , tangent space.

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利用扩展的双曲正切函数法获得了(2 +1)维长波短波共振相互作用方程的多组新显式精确行波解。

Applying the modified extended tanh-function methods, many types of new explicit traveling wave solutions of the (2 + 1) dimensional long wave-short wave resonance interaction equations are obtained.

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在对介质损耗角正切值多种在线监测方法进行详细分析的基础上，选中频域分析法。

Based on detailed analysis about dielectric loss measuring methods, the Spectrum Analysis Method is selected.

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在对介质损耗角正切值多种在线监测方法进行详细分析的基础上，选中频域分析法。

Based on detailed analysis about dielectric loss measuring methods, the Spectrum Analysis Method is selected.

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