水路运输可以最低的成本运送最大量的商品至最远距离。
Water transport can carry the greatest amount of goods for the longest distance with the lowest cost.
阅卷工作的介质是纸质试卷，不方便进行复制和远距离运输，使得试卷的保管和运送工作变得复杂。
Besides, the marking medium is paper, which can't be easily replicated and transported, and it is difficult to store and transport.
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