貓的邏輯原來是這樣 以後知道怎麼討好牠了!
Apparent magnitude - Wikipedia, the free encyclopedia哈哈...好妙~~ The apparent magnitude (m) of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere. The brighter the object appears, the lower the value of its magnitude. Gen...
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