64seconds
; u0 {! Q& ]0 a+ q& w/ Y9 F
% J- \/ e; O/ A6 @公仔箱論壇1 to 4 have 3floors = 48 sec
' @5 S+ V2 o6 E& Y, w; g" x& K; J公仔箱論壇avg. 48/3 = 16sectvb now,tvbnow,bttvb8 [, w0 _% n5 N. O& |- g: E
公仔箱論壇6 p7 t4 [" z' Q- ~* ^6 l; A9 ~
4 to 8 have 4floors = 16x49 k$ S: @# e! U3 k& `
= 64secs |