64seconds公仔箱論壇0 O* U6 `6 F$ ?7 U
. i' c' l' w, |) a7 c+ } O1 to 4 have 3floors = 48 sec
3 p K, V( {7 U# w0 pavg. 48/3 = 16sec
& }2 V, I: ^1 ~* N, T
9 B' I% |% ^: |www2.tvboxnow.com4 to 8 have 4floors = 16x4www2.tvboxnow.com% b5 \: h9 w4 v) v5 D/ E
= 64secs |