将关注重点放在以最快速度对不可预测的需求做出反应。
Priority should be put on the fastest reaction to the requirement which can not be forecasted.
但如果预测的需求过度超前于实际需求，则系统利用率太低，将造成资源的严重浪费。
If the forecasted demand excessively was in advance to actual demand, the low usage of system cause serious waste of the resources.
一个意外的惊喜在于，人们对水的需求并没有像一些人预测的那样快速增长。
Fortunately — and unexpectedly — the demand for water is not rising as rapidly as some predicted.
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