同义词

n. magnetic variation，variation

参考例句

1. an imaginary line connecting points on the Earth's surface where the magnetic declination is zero.
一条在地球表面上连接磁偏为零的点的假想线。
2. an imaginary line connecting points on the Earth's surface where the magnetic declination is the same.
在地球表面上连结具有相同磁偏角各点的一条联线。
3. The degree of difference between the positions of these two poles when seen at various locations is called magnetic declination.
在不同地点所观测到的这两个极位置之间的差异度数，被称为磁偏角。

英英解释

n.
  1. the angle (at a particular location) between magnetic north and true north

网络释义

magnetic declination
磁偏角; 磁力偏差; 磁偏; 磁差;
MAG DEC Magnetic Declination
磁偏移,磁偏角;
magnetic declination diagram
磁偏角略图;
magnetic declination angle
磁偏角;
declination of magnetic needle
磁偏角;