Mastering concrete performance variety, controlling unit water consumption, designing and checking the concrete match ratio strictly, and performing efficient administration are important.
掌握混凝土材料性能的变化，实施对混凝土单位用水量的有效控制和对混凝土配合比进行严格设计、检验并进行有效科学管理。
The high metabolic rate of small animals, for example, gives them sustained power and activity per unit of weight, but at the cost of requiring constant consumption of food and water.
例如，小动物较高的新陈代谢率，以其体重的每单位计算均能赋予动物以持续不断的能量和活动能力，但其代价是，要求它们不间断地消耗水和食物。
At the meantime, it generalizes the water circulation into natural and human water circulation system using water supply and water consumption unit to simulate their structure factors.
同时，将流域水循环系统概化为自然水循环系统和人工水循环系统，分别用供水单元和用水单元模拟其结构构成要素。
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