名词
中文翻译：极数
同义词：
['polar point', 'pole number', "polarity number例句：1. The polar number of the Earth's magnetic field is 90 degrees.（地球磁场的极点数是90度。）"]
例句：
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1. The polar number of the Earth's magnetic field is 90 degrees.
地球磁场的极点数是90度。
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2.In mathematics, a polar number is a number that can be expressed as the sum of two squares.
在数学中，极数是一个可以表示为两个平方和的数字。
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3.The polar number of a complex number is its imaginary part.
复数的极数是它的虚部。