文中提出一种考虑节水因素的凝汽器最佳真空的确定方法，为降低发电成本及减少环境污染提供了一项有效的途径。
This paper gives methods of determining the optimum vacuum of condenser that takes account of the save on cooling water, the methods can help reduce costs and environ.
滴灌是目前世界上最为节水的高效灌溉技术，但其昂贵的系统成本严重制约着该技术的推广应用。
Drip irrigation is the most water-saving irrigation technology with high efficiency. However, its expensive system cost seriously restricts extension and utilization of the technology.
通过回收和重复利用冷却水，既节水节能，还可保障实验课进度和降低实验课成本。
What's more, not only can it save water and energy, but also it helps to ensure the experimental schedule and reduce experimental cost.
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