这种情形因为污染导致人类水源可利用率降低而趋于恶化。
This situation is worsened by pollution which results in decreased water availability for human use.
不同表面活性剂的助吸效果有一定差异，如果使用不当，容易引起叶面伤害、养分利用率降低等不良反应。
Because of the different properties, the improper application of surfactants will lead to foliar injury, lower nutrition efficiency and other undesired consequences.
但随着负荷率的降低，发动机转速被限制在最小转速下运行，系统的一部分供热量被浪费，一次能利用率降低。
However, with the lower load factor, engine speed is limited to the minimum speed run, part of the system for the heat is wasted, a lower utilization.
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