We can describe quantities of electric magnetic field in different inertia system, and use Lorentz transformations to educe the transformations between them.

描述电磁现象的场量在不同的惯性系中有不同的量值，利用洛伦兹变换关系式导出它们之间的变换形式。

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On this basis, draw magnetoelastic movement stability equation of thin current-carrying plates under the effect of electric magnetic field and machinery load.

并在此基础上，得出了载流薄板在电磁场与机械荷载共同作用下的磁弹性动力稳定性方程。

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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.

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。

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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

Creating a magnetic field using electricity is easy: an electric current flowing in a wire generates a magnetic field around that wire.

ECONOMIST: Recreating the planet's magnetic field in a laboratory

The metal returns up the outer cylinder, and electric currents create a magnetic field.

BBC: Planet Earth

Dr Benford reckons some of them could have built up an electric current as they moved through the strong magnetic field that pervades the centre of the galaxy.

ECONOMIST: Here be serpents