名词
中文翻译：协变方程
同义词：
['covariant equation', 'covariant form', 'covariant transformation']
例句：
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1. The covariant equation is used to describe the relationship between variables.
协变方程用于描述变量之间的关系。
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2. In mathematics, the covariant equation is a key concept in differential geometry.
在数学中，协变方程是微分几何的关键概念。
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3. The covariant equation can be used to solve problems involving rotations and translations.
协变方程可以用来解决涉及旋转和平移的问题。