magnetic variation
短语[电] 磁变
词形变化
magnetic variations
复数
magnetic variations
释义与例句
n.
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1.
In navigation, at a given place and time, the horizontal angle between the true north and magnetic north measured east or west according to whether magnetic north lies east or west of true north.
可数 不可数 政治 军事 航海 交通 -
2.
In cartography, the annual change in direction of the horizontal component of the Earth’s magnetic field.
可数 不可数