自然界规定了谁的储量是固定的，与此同时，伴随着世界人口的的急剧增加，水的需求量也就不可避免的迅猛增长。

Nature has decreed that the supply of water is fixed. Meanwhile demand rises inexorably as the world's population increases and enriches itself.

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节假日期间，出行车流急剧增加，特别是单一方向的车流，车流的迅猛增加导致高速公路容易产生交通拥堵。

In holidays, travel traffic flow increases dramatically, particularly in a single direction of traffic, and the rapid increase in traffic flow leads expressway to prone to traffic jams.

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