64seconds
$ u$ K8 L; b/ T3 G5.39.217.77- Y+ y/ D9 f; B% I+ o4 I
1 to 4 have 3floors = 48 sec* z" H# z6 I4 C% {1 E
avg. 48/3 = 16sec
9 f" t, `$ b6 m* F0 aTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。tvb now,tvbnow,bttvb6 d: ?- _& ~/ e% Y c' a( p
4 to 8 have 4floors = 16x4
: @' N# ]! b7 G= 64secs |