64seconds
4 G2 q4 ?1 y1 i
6 i; d R, p, A2 z+ ~. O8 r公仔箱論壇1 to 4 have 3floors = 48 sec
' U7 j- o0 x* p5 k4 m* c- b r5.39.217.76avg. 48/3 = 16sec# A- V4 f; t2 }) L/ W+ @
# r2 V$ K0 Y7 ?: R n- N$ w, a7 e
4 to 8 have 4floors = 16x4
. P) S( R- _# f$ z3 a4 o3 c- T4 u公仔箱論壇= 64secs |