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1. The radiation derivative of the wave equation is used to describe how the wave propagates through space.
波方程的辐射导数用于描述波如何在空间中传播。
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2. In this study, we use the radiation derivative to model the behavior of a particle in a magnetic field.
在这个研究中，我们使用辐射导数来模拟粒子在磁场中的行为。
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3. The radiation derivative is a key concept in the study of electromagnetic waves and their interactions with matter.
辐射导数是研究电磁波及其与物质相互作用的关键概念。