1832年，也就是迈克尔·法拉第发现磁场变化会产生电场的那一年，一位年轻的法国工程师为一种新的、效率更高的水车申请了专利。

In 1832, the year of Michael Faraday's discovery that a changing magnetic field produces an electric field, a young French engineer patented a new and more efficient waterwheel.

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电容产生电场，线圈生成磁场，电路中的能量就在电场和磁场之间高速振荡。

The energy within this circuit oscillates rapidly between an electric field in the capacitor and a magnetic field in the coil.

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这些方程以最优雅、最简洁的方式描述了电场和磁场的特性以及电场、磁场与物质互相作用的方式。

These equations represent one of the most elegant and concise ways to state the behaviour of electric and magnetic fields and how they interact with matter.

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You've got a magnetic field, maybe even magnetic susceptibility, the electric field. We're not going to worry about these magnetic fields or electric fields in this class So, pretty much we're going to focus on this set of variables here.

你也会引入磁场，或许甚至磁化率，以及电场，我们这堂课不需要关心,这些磁场或,电场之类的东西,基本上我们只关注,这里的一组变量。

麻省理工公开课 - 热力学与动力学课程节选