The use of magnetic resonance allows energy to be transferred in useful quantities and almost entirely to the device.
利用磁共振能够传输足够使用的能量，并且能量在到达接收器前的耗损量非常小。
2
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。
3
In South China which lies in low latitudes, there are large quantities of granites and volcanic rocks, whose magnetic fields are different from those in other areas.