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14#
發表於 2007-9-2 12:37 AM
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Originally posted by alienck at 2007-9-2 12:32 AM:- b& d) Z! q1 o1 N6 U
; `- Z. i$ m. s% W5 |7 c$ ?7 {) U0 x' ~( G" M; U! `+ h4 H+ a
可能係3m/s吧............ " Z+ S1 J! B e1 u' v t& W9 ]
8 i- K% T4 _. C+ F另外
( x4 n% m5 K+ e6 F3 a2 {8 Z' r4 F1 U.S. survey mile (also called "statute mile") = 1 mi = 5280 ft, ~* X( T2 e6 C! M
1 international mile = 1 mi = 5280 ft
, P7 T2 ~! ]: I4 P- @& i, a7 @1 ft = 0.3048 m
, w# `) n) n/ ~4 n0 a# c# C# ~所以 1mi = 1.6km8 b, P- x3 d, \5 Y9 [9 p
' V2 a" m& K4 ?9 A8 z$ o
ref: NIST |
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