It is urgent to develop ecomaterials , which use economically energy and have no harm to environment 人们迫切需要开发能够经济有效地利用能源并具有不污染环境的功能材料。
Calculation results show that by the heat pump technology , the freezing heat can be used economically and practicably , and therefore be taken as a low temperature heating source for buildings 计算结果表明,热泵可以在经济、可行的前提下大量利用冷水凝固热,作为建筑的低温供暖热源。
With the development of computer and internet technology by leaps and bounds , it ' s important to build irrigation area information system , which has perfect function , runs reliably , uses economically 随着计算机及网络技术的飞速发展和水利信息化进程的加速,建立功能齐全、运行可靠、经济实用的灌区信息化系统已是各级水利部门和业内人士一致达成的共识。
With the development of computer and internet technology by leaps and bounds , it ' s important to build water conservancy information system , which has perfect function , runs reliably , uses economically 随着计算机及网络技术的飞速发展和水利信息化进程的加速,建立功能齐全、运行可靠、经济实用的水利信息化系统已是各级水利部门和业内人士一致达成的共识。
In conducting our business of providing excellence in postal services , we try to ensure that our services and operations are conducted in an environmentally - friendly and responsible manner , and that our resources are used economically and effectively 我们在提供卓越的邮政服务时,亦须以负责任的态度确保各项服务及运作程序均符合环保原则,务求各种资源都用得其所,绝无浪费。
In this passage , author has studied the quota of irrigation that can make water used economically for various plants , if the irrigation quota can be lowered from 6795 m3 / a to 4500 m3 / a during the processes of irrigation , there will be a saving water amount of 3 . 386million m3 / a , in shiyang river basin . there is no doubt that we can open the second source of river water that can provide the possibility of transporting 300 million m3 / a water amount to lower reaches of the river . in this paper , there are some analysis and prospects for the future situation of supply and demand of water resources in 2010 民勤水资源减少的主要原因是人为因素,如全流域人口增加、中上游耕地面积扩大,用水量增加,造成灌区重心上移;没有树立可持续发展观,在经济中搞短期行为;对石羊河流入民勤水量不断减少、地表水、地下水转化活跃、生态用水问题突出等方面进行了分析论证;对目前开发利用现状、供需状况进行了较为详细的计算和评价;通过对各种农作物节水灌溉定额的研究,若从现状灌溉定额6795m ~ 3 ha降低到4500m ~ 3 ha实施灌溉,石羊河流域将节水3 . 3867亿m ~ 3 ,这无疑于开辟了第二水源,提供了向下游调水3亿m ~ 3的可能性。