A magnetic resonance imaging apparatus includes a first magnetic field coil (30) and a second magnetic field coil (32).

一种磁共振成像设备包括第一磁场线圈(30)和第二磁场线圈(32)。

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Before the successful development of this system, the coil spacing in the magnetic field coil system was fixed and there are large magnetic gradients in almost all the environment;

迄今为止使用的磁场线圈间距全为固定式，而环境又几乎全有较大的磁场梯度。

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

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。

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That is we make animation file when you put the current to the coil of the field, getting established magnetic field.

即通过制作动画效果,当你将电流,输送到线圈上，形成磁场。

麻省理工公开课 - 媒体、教育、市场课程节选

For example, one of the experiments we do is measure the magnetic field of current coil, and after we do the experiment, we all have a passive visualization that shows the same experimental set-up, except we add to that.

比如，我们做的一个实验就是,测量电线圈的磁场，在我们做完实验之后，我们都感受到了一个直观化的过程,它展现了同样的实验过程，只是那是我们加的。

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Instead, the coil is pulled through the external magnetic field, which induces a voltage across it.

ECONOMIST: Weighing a kilogram

The coil is suspended in an external magnetic field and the current running through it adjusted so that the attraction between the two magnets balances the gravitational force on the suspended mass.

ECONOMIST: Weighing a kilogram

That is because the transmitter uses a large flat coil, placed over the heart, to generate the magnetic field that powers the receiver.

ECONOMIST: Case history