引用:
原帖由 chefung 於 2008-10-21 09:20 AM 發表
Oh, just a quick question.
Artificial ones of course obey the law of gravitation that it will pulled by the Earth. However, visually, is there any significant gravity-induced difference between n ...
ar... i don't agree with you
artificial ones don't obey the law of gravitation...
those some natural ones can resist such force fro some years....
hm... i m looking down... to my tummy... LOL