64seconds
" }% ]1 ?5 v) p! _# n$ btvb now,tvbnow,bttvbtvb now,tvbnow,bttvb9 y5 l0 @# H, A9 ^* \) X
1 to 4 have 3floors = 48 sec
o' t% t# y" V7 s& ]公仔箱論壇avg. 48/3 = 16sec
$ o! a' _$ Y7 w4 U' O( g6 [) T
' L! L' n" M* y2 Z! P3 W0 z4 to 8 have 4floors = 16x4
& u: ]8 f: x* G$ Y5 c/ N2 ] k= 64secs |