electromagnetic field[电]电磁场
electromagnetic wave[电磁]电磁波
词根:electromagnet
n.electromagnet 电磁体,[电] 电磁铁;电磁石
electromagnetism 电磁;电磁学
electromagnetics [电磁] 电磁学
3.When the antenna receives a signal, the electromagnetic energy is converted from AC to DC.
当天线接收到信号时,电磁能量将从AC转换到DC。
4.Some also suggest that animals detect changes in the air or in electromagnetic fields.
另外一部分科学家则认为动物能够察觉空气或者电磁场里发生地变化。