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.The geomagnetic field varies continuously.地磁场不断地发生变化...
那种牛排多骨,很不易吃.That steak is bony and difficult to eat.它的下颚直接铰接在头骨上,还有多骨的, 有肉的 、 有接缝的鳍.It has a jaw that is hinged at the cranium and has bony, meaty, jointed fins....