n.地磁气；地磁气学
The pill is always in the geomagnetism during flying. 弹体在空中飞行时一直处于这个大磁场中。
The paper discusses how a steady remanence affects the performance of an attitude determination and control system using geomagnetism. 讨论了稳态剩磁对地磁姿态确定与控制系统的性能的影响。
This site offers general information about the research of the Geomagnetism and Paleomagnetism Section of AGU. 这个网站提供了美国地球物理协会（AGU）地磁学和古地磁学分部的研究信息。
The earth is surrounded by the geomagnetism.The geomagnetism is stable and has some regulation. 地球磁场遍布整个地球，而且相对比较稳定，并有一定的规律可循。
Gauthier began to carry out his geomagnetism observation in Xujiahui Catholic Church of Shanghai. Gauthier在上海徐家汇天主教堂开始了地磁观测。
