you may push the break a lot, waste the potential energy
下山 save a little, but cannot compensate all,because
所有跟帖:
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那就坚持上山不踩油门,下山不踩不踩刹车~
-满地找牙-
♂
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08/16/2011 postreply
13:16:24
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或者上山推车,下山拉车
-瞎走瞎拍-
♂
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08/16/2011 postreply
13:18:30