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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:8 X4 K" V+ c5 d. O. b
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' n( l T# }4 u5 V+ h/ N, A可能係3m/s吧............ ) A. ?) o2 ~) D, O0 P5 e: D, I9 v9 b" V' I4 g3 H5 k- n
另外
3 D4 f# u$ f: u. C6 r4 e2 \1 U.S. survey mile (also called "statute mile") = 1 mi = 5280 ft8 Z; K/ o. w- _* }9 M' j
1 international mile = 1 mi = 5280 ft: e+ R, w' M- L
1 ft = 0.3048 m/ M6 G# z9 s; g' g; U! b
所以 1mi = 1.6km
1 K% \& X: E4 K
! L5 n% W% x/ w9 nref: NIST |
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