64seconds
: a/ e4 m3 S2 r$ Dtvb now,tvbnow,bttvb
; B+ ~, ~. l! |2 u# h, ~$ I1 to 4 have 3floors = 48 sec公仔箱論壇7 {# B" {, ]* e
avg. 48/3 = 16sec公仔箱論壇" ]9 r. P* K R9 s8 `, [, D6 h
% |* e* O" T5 g2 d
4 to 8 have 4floors = 16x4
6 z/ ^* { s- z9 `0 _: Y; d5.39.217.76= 64secs |