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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:
- ]) a( G }# Q q& B$ V+ Z# B
2 \& f: ], O# }3 R* ?$ K, ~9 I m* O; j: T. W" d6 l& \, k
可能係3m/s吧............ 1 ~3 T7 u+ p8 N2 y, I, l$ h( G. ]! ~4 ~% l2 S/ c
另外4 u# ]1 f3 r& j) g
1 U.S. survey mile (also called "statute mile") = 1 mi = 5280 ft, |8 T" L3 A1 L" x
1 international mile = 1 mi = 5280 ft7 z g. M v5 a+ e- G( x
1 ft = 0.3048 m/ S4 a) B/ P( d, z2 @
所以 1mi = 1.6km4 ]" p% N1 ?' C' t
3 T- d0 t8 W4 m7 L. T4 M4 |5 D
ref: NIST |
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