He also realised that varying the strength of an electric field would generate a changing magnetic field, even in empty space with no moving electric charges to speak of.

他同时认识到，变化电场强度将会产生一个变化的磁场，甚至在一个没有移动电子的空间中也是如此。

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Today, there are three main types of space sail: solar ( the one NASA plans to test), electric (being developed in Finland) and magnetic (a concept popular in the 1980s that never quite took off).

现今已有3种主要的太阳帆：太阳驱动（NASA计划测试的类型），电驱动（正在芬兰开发）和磁驱动（1980年代很时髦如今也不算太过时）。

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They sort left from right versions using circularly polarised light, whose electric field corkscrews through space in a left or right-handed direction.

旋转偏振光被他们用来筛选左手性和右手性分子，这种光的电场以左手或右手螺旋形式在空间旋进。

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We know what an electric field is, it's just a space through which a Coulomb force operates.

我们知道，电场不过,是库仑力的作用空间。

麻省理工公开课 - 化学原理课程节选

Yet, while we all enjoy reading articles about new gizmos, electric cars, space-age wind turbines, and of course, the latest advances in photovoltaics, these advancements represent only the surface of a much larger, systemic change in the way we will soon conduct business.

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Musk has outsized ambitions to create private sector space travel and electric sports cars.

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Perhaps coal handlers employed on diesel-electric locomotives, mafia goons controlling space at the municipal convention center or Broadway musicians paid even if the show doesn't need them.

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