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。

youdao

Well,a small change in plans.If you actually have a varying magnetic field that passes through that wire then that will actually generate voltage in it.

这和以前不同了，如果存在一个变化的磁场,穿过金属线圈,线圈内就会产生一个电压。

youdao

Magnetic particles also can have resonant response to a time-varying magnetic field with advantageous results related to the transfer of energy from the exciting field to the nanoparticles.

磁性颗粒能在时间变化磁场中产生共振响应，因而能很好地将能量从激发场转移到纳米颗粒中。

youdao