China is a water-deficient country as well as a water-extravagant, water-polluted and low water efficiency country.
我国不但缺水，而且用水浪费、污染水源和利用率低。
The test results indicated that the variation of the spacing between propeller and rudder bulb has obvious effect on propeller open water efficiency.
试验结果表明，桨、舵球间距的变化对螺旋桨敞水效率的影响是明显的。
Water efficiency provides long term water security by making use of the water we already have to sustain our communities and ecosystems.
提高水的利用效率，可长远保护我们社区和生态系统用水安全。
Water efficiency of irrigation is a key criterion for evaluation of agricultural water saving effect.
灌溉水利用系数是衡量农业节水效果的关键指标。
Energy and Water Efficiency Auditing: Auditing program development and implementation for small and medium-scale existing buildings.
能源和用水效益审计：为中小型规模的现有建筑物制定和实施审计方案。
Energy and Water Efficiency Auditing: Auditing program development and implementation for small and medium-scale existing buildings.
能源和用水效益审计：为中小型规模的现有建筑物制定和实施审计方案。
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