铁箱能使地球磁场影响不了指南针。
An iron case will keep the Earths magnetic field away from the compass.
太阳耀斑对于地球磁场也有作用。
一种用来测量地球磁场倾角的仪器。
An instrument used to measure the dip of the Earth's magnetic field.
用来测量地球磁场强度和方向的仪器。
An instrument used to measure the strength or direction of the Earth's magnetic field.
但也有人认为，鸟类是靠地球磁场导航的。
But others believe the birds are navigated by the earth's magnetic field.
地球磁场由国际地磁参考场和磁力异常场叠合建立。
Earth's magnetic field is composition of International Geomagnetic Reference field and magnetic anomaly field.
地球磁场由国际地磁参考场和磁力异常场叠合建立。
Earth's magnetic field is composition of International Geomagnetic Reference field and magnetic anomaly field.
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