正如你能想到的，乡下很多路都很难走。
As you can imagine, many country roads are difficult to walk on.
正如你怀疑的一样，他们消耗更少的能量是因为他们用更少的步子就能走一样远的路。
They expend less energy because-just as you may have always suspected-they simply need fewer strides to cover the same ground.
正如你怀疑的一样，他们消耗更少的能量是因为他们用更少的步子就能走一样远的路。
They expend less energy because-just as you may have always suspected-they simply need fewer strides to cover the same ground.
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