1. Pilots must compensate for magnetic variation during flight.
飞行员在飞行过程中必须补偿磁偏角。
2. The local magnetic variation is about 10 degrees east.
当地磁偏角约为东偏10度。
3. Accurate maps indicate the magnetic variation for each region.
准确的地图标明了每个地区的磁偏角。

A: How much is the magnetic variation in this region?
A：这个地区的磁偏角是多少？

B: It is approximately 5 degrees west.
B：大约是西偏5度。

1) 磁北与真北之间的夹角

2) 航海与航空导航的核心参数

3) 随地理位置变化的磁性差异

1. 磁偏角

e.g.You must account for magnetic variation when using a compass.
使用指南针时，你必须考虑到磁偏角。

noun phrase

1. The angle between magnetic north and true north.

Synonym: magnetic declination