put 3 balls on each side, 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。; B! _& _9 h4 ^7 _, N! E6 t+ R
if balance, we can prove that all 6 balls on the 天平 is normal,
' {/ C2 T3 Z a& Iif not balance, we can prove that the 6 balls outside the 天平 is normal.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。; S! |0 C, M' Q: t
then use the proved-normal ball on one side and put the other ball on other side tvb now,tvbnow,bttvb! M& p( l9 s+ \3 X- n2 M7 L" @
to determine the abnormal is heavy and light |