利用系数: availability ratiocoefficient of occupationcoefficient of usecoefficient of utilizationfactor of utilizationoccupation factoroutput coefficientproductivity ratioratio of utilizationservice
Earlier this year gauthier hulot of the paris geophysical institute and his colleagues used satellite measurements to track changes in the field ' s behavior near the top of the core 今年（ 2002 ）年初，法国巴黎地球物理研究院的余洛和他的同事，利用卫星测量来追踪接近地核表层的磁偶极场的变化。
