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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:
4 O, I8 }0 X0 M& Q* k H. \+ V; k
- h3 A0 ~0 R, e1 _0 S
- M# K6 Z# P* m, n5 H8 C& v1 U可能係3m/s吧............ % z0 [' h; V: X6 m
1 r A* ?& \5 U* o# r8 J另外) x" w% p! e: A" g2 ? w, L
1 U.S. survey mile (also called "statute mile") = 1 mi = 5280 ft9 Z2 B9 q3 o* U y" _* H1 j, J4 z% s% [
1 international mile = 1 mi = 5280 ft
; R6 L( a1 h$ B9 S+ u1 ft = 0.3048 m2 l7 D. F9 C3 P$ i, l" G) c3 r
所以 1mi = 1.6km! X% d) q6 S8 A4 _: d# s1 u0 [8 P# g
- e, c, p" c: Q/ q( }
ref: NIST |
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