同时用水效率低，水浪费和水污染现象严重，这主要是由不合理的水价所致。
Water is used in low efficiency. Serious water waste and water pollution are mainly caused by unreasonable price.
造成我国部分地区水源供给不足和全国水环境普遍污染的重要原因是用水效率低和污水排放量大。
The important reason of causing our country source of water supplying insufficient and national water environment pollution in some area is low water efficiency and large sewage emission.
中国是水资源严重短缺的国家，水环境污染、用水效率低、用水浪费和管理水平落后是我国水资源管理中存在的主要问题。
China is a country with severe water shortage. The main problems of the water resources management are water pollution, low efficiency of water using, water waste and behind the management level.
灯泡贯流式机组具有适用水头低、流量大以及效率高等特点，广泛用于开发低水头水力资源。
Low applicable head, high flow and high efficiency characterize bulb type tubular turbine unit. These kinds of units are widely used for the development of low-head water resources.
采用高效低肋螺纹换热管，具有换热效率高、体积小、用水量小等优点；
With high efficiency and low rib thread Tube with heat transfer efficiency, small size, the advantage…
使用空冷器可以节约大量的工业用水，但传统空冷器热效率低、体积大、噪音大。
It can save a large quantity of industrial water to use the air cooled exchanger. But the traditional air cooled exchanger is low efficiency, larger dimension &high noise.
使用空冷器可以节约大量的工业用水，但传统空冷器热效率低、体积大、噪音大。
It can save a large quantity of industrial water to use the air cooled exchanger. But the traditional air cooled exchanger is low efficiency, larger dimension &high noise.
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