The earth ' s magnetic field is produced by the flow of electrically charged particles in the liquid part of the earth ' s core , which is mainly composed of iron 地球磁场是由地核流体部分中带电粒子的流动而产生的，其流体部分主要由铁组成。
Occurrence of geomagnetic storms ( i . e . severe distortion of geomagnetic field of the earth ) can induce electric current in oil pipelines and electric cables 对输电系统及输油管的影响地磁暴（即地球磁场急速变形）会使输油管及电缆产生电流。
The spacewalkers will also remove an experiment that measured the electrical environment around the outside of the station , as it flies through earth ' s magnetic field 太空漫步者们也将升级新的试验来测试当太空战穿过地球磁场之时的周围电子环境。
The spacewalkers will also remove an experiment that measured the electrical environment around the outside of the station , as it flies through earth ' s magnetic field 太空行走人员也将升级一项太空站外面电子环境的测试实验，当它穿越地球磁场的时候。
Naturally , people have wondered whether pigeons might have a built - in compass - - something that would tell them about the direction of the earth ' s magnetic field 自然，人们一直想知道信鸽是否有一种内在的指南针?一个能使其知道地球磁场方向的什么东西。
A major discovery unfolded over the past five years as it became possible for scientists to compare accurate maps of the geomagnetic field taken 20 years apart 过去五年里，由于科学家终于能够比对相隔20年所观测到地球磁场的准确分布，因而有了重大发现。
Nasa fired three microsatellites into space wednesday to study the earth ' s magnetic fields , a week after an earlier launch was scrubbed 在比原计划推迟了一周之后，美国宇航局22日终于利用飞机加火箭的方式将3颗微型卫星送上了太空，开始了对地球磁场的研究工作。
The mission ' s goal is to demonstrate the benefits of a group of small , low - cost satellites simultaneously measuring the magnetic fields from different locations 这次发射的目的在于证明，用一组小型低成本的卫星，从不同位置同时地球磁场的好处。 st5微型卫星
In communications , a disturbance in the ? earth ' s ? magnetic field , associated with abnormal solar activity , and capable of seriously affecting both radio and wire transmission 在通信技术中,在异常的太阳活动时,地球磁场的扰动,可能严重地影响无线传输和有线传输。
This paper introduces the formation of magnetic field , polarity reversal , secular variation and the use of geomagnetic polarity reversal or susceptibility in stratigraphic study 摘要本文介绍了地球磁场的成因、极性变化以及运用极性倒转划分对比地层和指示环境。
