magnetic secular change

secular... ... the secular bird n. 不死鸟,凤凰 magnetic secular change 磁长期变化 secular aberration 长期光行差 ...

航海及海运专业英... ... magnetic screening 磁屏蔽 magnetic secular change 地磁长期变化 magnetic semiconductor 磁性半导 …

测量学专业词汇英语翻译（二） ... 磁层 magnetosphere 磁常变 magnetic secular change 磁场 magnetic field ...