The geomagnetic field varies continuously .地磁场不断地发生变化。The geomagnetic field varies continuously.地磁场不断地发生变化.Electric compass is a sensor used to determine direction with the help of geomagnetic field.电子罗盘是一种利用地磁场来测量方位的传感器...

地磁场...

geomagnetic field的音标：...