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XKCD中文站,一个关于浪漫、隐喻、数字、以及语言的线上漫画。

Radians are Cursed

中文翻译
Radians are Cursed
Phil Plait once pointed out that you can calculate the total angular area of the sky this way. If the sky is a sphere with radius 57.3 degrees, then its area is 4*pi*r^2=41,253 square degrees. This makes dimensional analysts SO mad, but you can't argue with results.

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