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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:
V& E% R6 m$ b/ g( G
$ P; X: [9 \/ Z* P, d* a
/ o# g! p# v B( t2 F可能係3m/s吧............ 8 K& y. J$ m+ c
G+ Y& r: K! Y/ t# v& D, V7 e K! D另外6 J' n+ N4 F o5 e, k' K
1 U.S. survey mile (also called "statute mile") = 1 mi = 5280 ft
! G( d7 M, n2 F& W; x: R1 international mile = 1 mi = 5280 ft
2 J- H, N8 n% o" ]& d; g" P1 ft = 0.3048 m" j% ~, u2 P' N: y+ D; D
所以 1mi = 1.6km
/ [$ ?# H& j5 \. B: I* T" \5 @4 z9 m( f3 }! V! C
ref: NIST |
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