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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# {/ }5 u9 ]' L, M" |; [
( x! U, _, `; q0 H4 ]: [: r
& [- P k# k1 y+ m6 j可能係3m/s吧............ q) x+ F1 x& j* b3 O, z! k
% q! D( d+ z, `0 C+ E; j另外' Z h, g- t9 [8 t% K
1 U.S. survey mile (also called "statute mile") = 1 mi = 5280 ft
/ o2 ~- I- {. n1 international mile = 1 mi = 5280 ft
) R. l) C+ a6 q1 ft = 0.3048 m
" U' T3 f( }6 p2 `6 L$ K所以 1mi = 1.6km' ~- ]' s! W9 O5 t
! Y3 c7 }* l- v! A, Mref: NIST |
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