use economically中文什么意思

use: n. 1.使用，利用，應(yīng)用；使用的機(jī)會[需要]。 2.使 ...
economically: 節(jié)約地, 不浪費(fèi)地, 節(jié)省地, 節(jié)儉地, 在經(jīng)濟(jì)上, 在經(jīng)濟(jì)學(xué)上; 節(jié)約地，在經(jīng)濟(jì)上; 經(jīng)濟(jì)地，便宜地
economically feasible: 經(jīng)濟(jì)可行; 經(jīng)濟(jì)上合算; 經(jīng)濟(jì)上可行的
economically independent: 經(jīng)濟(jì)獨(dú)立
economically practical: 經(jīng)濟(jì)上可行的; 經(jīng)濟(jì)上切實(shí)可行的

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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(kuò)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(jì)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(jìn)行了分析論證；對目前開發(fā)利用現(xiàn)狀、供需狀況進(jìn)行了較為詳細(xì)的計(jì)算和評價(jià)；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(shí)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。

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