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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:) L" v- M# h' c: R7 {' o4 ^
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) x; r2 L6 d% s, N5 J# U+ |可能係3m/s吧............ : G" s) X+ y" \2 O+ [( x1 U7 t$ g
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另外" {9 i5 N4 Z5 W6 K: K' o! n/ @1 C
1 U.S. survey mile (also called "statute mile") = 1 mi = 5280 ft9 D- [3 \, z, k, j* H7 X, F
1 international mile = 1 mi = 5280 ft' e* c5 r' \! U+ }$ ~3 ^& v
1 ft = 0.3048 m
) W- X( P( @5 Z2 H所以 1mi = 1.6km
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ref: NIST |
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