整个讨论过程具有广义协变性。

Thewhole procedure used is generally covariant.

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从相对论协变性原理出发，得到了电流密度方程满足相对论协变性的自洽展开式。

According to the principle of relativistic covariance, this paper presents the relativistic covariant equation of current density.

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从一道力学试题出发，讨论了机械能守恒的条件，并深入研究了守恒规律的协变性要求。

Some mistaken viewpoints were clarified, and requirements on covariability of conservation law were studied deeply.

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