polar diameter 中文意思是什麼
polar diameter
解釋
極直徑-
Polar distance ; polar diameter
極距;兩極的直徑 -
The earth is slightly flat at the poles, so that the polar diameter is slightly less than the equatorial diameter
地球在兩極扁平一點,所以其極直徑略小於赤道直徑。
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