沙上垫石子,不久石子陷入沙子,就又会修路,再垫石子,这样形成的沙石路真是凹凸不平。我那会儿就是年轻,现在要还走那样路况的公路,恐怕几里路就会受不了了 :))
沙上垫石子,不久石子陷入沙子,就又会修路,再垫石子,这样形成的沙石路真是凹凸不平。我那会儿就是年轻,现在要还走那样路况的公路,恐怕几里路就会受不了了 :))
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