It is urgent to develop ecomaterials , which use economically energy and have no harm to environment 人們迫切需要開發(fā)能夠經(jīng)濟有效地利用能源并具有不污染環(huán)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 計算結(jié)果表明,熱泵可以在經(jīng)濟、可行的前提下大量利用冷水凝固熱,作為建筑的低溫供暖熱源。
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 隨著計算機及網(wǎng)絡(luò)技術(shù)的飛速發(fā)展和水利信息化進程的加速,建立功能齊全、運行可靠、經(jīng)濟實用的灌區(qū)信息化系統(tǒng)已是各級水利部門和業(yè)內(nèi)人士一致達成的共識。
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 隨著計算機及網(wǎng)絡(luò)技術(shù)的飛速發(fā)展和水利信息化進程的加速,建立功能齊全、運行可靠、經(jīng)濟實用的水利信息化系統(tǒng)已是各級水利部門和業(yè)內(nèi)人士一致達成的共識。
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 我們在提供卓越的郵政服務(wù)時,亦須以負責任的態(tài)度確保各項服務(wù)及運作程序均符合環(huán)保原則,務(wù)求各種資源都用得其所,絕無浪費。
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 民勤水資源減少的主要原因是人為因素,如全流域人口增加、中上游耕地面積擴大,用水量增加,造成灌區(qū)重心上移;沒有樹立可持續(xù)發(fā)展觀,在經(jīng)濟中搞短期行為;對石羊河流入民勤水量不斷減少、地表水、地下水轉(zhuǎn)化活躍、生態(tài)用水問題突出等方面進行了分析論證;對目前開發(fā)利用現(xiàn)狀、供需狀況進行了較為詳細的計算和評價;通過對各種農(nóng)作物節(jié)水灌溉定額的研究,若從現(xiàn)狀灌溉定額6795m ~ 3 ha降低到4500m ~ 3 ha實施灌溉,石羊河流域?qū)⒐?jié)水3 . 3867億m ~ 3 ,這無疑于開辟了第二水源,提供了向下游調(diào)水3億m ~ 3的可能性。