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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:# C- m8 B, j+ n7 e2 ]. i* \
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, L; b6 ]& m9 `6 t) G可能係3m/s吧............ 1 v% A! C9 {/ p
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另外0 c+ [5 K* i8 n( ?+ u
1 U.S. survey mile (also called "statute mile") = 1 mi = 5280 ft
9 x+ F B0 s, N, V: p' \1 international mile = 1 mi = 5280 ft# q, V n$ ^. m- x2 t1 [
1 ft = 0.3048 m, X H0 [) c9 `. \' G, x( d# W
所以 1mi = 1.6km1 Z9 R# }# c2 L0 t) x8 \: Y
' ]: a# m5 ^' V, j) X, r4 Vref: NIST |
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