mamasing

I agree, I heard that astronaut cannot pee or shit while they are in space.5.39.217.761 o2 ~) c9 N- D$ R& B- S
It must be a painful joruney.TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。+ d' Z0 b8 J. Q
Oh BTW, if your lecturer talks about "地心引力" in your Physics class.
7 W4 P, B4 g9 w8 a公仔箱論壇I suggest you pack and pick other subject instead, if you really like Physics, TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。9 a' V: P) o. [/ ~5 q% `
you need to switch school.
8 x9 W3 O' O0 F, U# N% p. X2 t# e9 r5.39.217.76There is no 地心引力, but "gravitational" force only.tvb now,tvbnow,bttvb! W7 l( \3 S+ J2 @1 h
A simple meaning of Gravitational force = the force of attraction between any 公仔箱論壇: }9 P& e+ Y2 X: g3 W3 \1 U
two masses.0 _4 ?+ @; h2 p4 g
5.39.217.768 e, t) p% y$ r  g7 ?8 u
Gosh, I got fooled by my HK Physics teacher many years ago.