假如地球是中空的 What if the Earth were Hollow

I DO NOT OWN THIS VIDEO!
The copyright and ownership of this video belong to original film-makers.
I translated for SHARING ONLY

original film : http://www.youtube.com/watch?v=jN-FfJ...
MinutePhysics channel :
http://www.youtube.com/user/minutephy...
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翻譯 字幕 by B平方
因為涉及到專業領域 有些詞彙如果用錯 還請指正
地球科學跟物理都還老師了...(掩面)
Note待補..--------------