Water ice is a critical resource for future space travelers, as well as a requirement for the development of life as it is currently known.
对未来的太空旅行者来说，水冰至关重要，就目前的认知程度而言，水冰也是生命成长的必要条件。
Lobbyists hope to water down some of the more contentious provisions, such as a requirement for Banks to spin off their derivatives units.
说客们希望弱化那些存在激烈争议的条款，比如银行必须剥离他们的衍生品业务。
Nor must bottled water companies test water with certified laboratories, a requirement for tap water suppliers.
瓶装水公司也并没有被要求像自来水供应商那样，只能通过公证的实验室进行水质检测。
Drinking eight glasses of water per day is a requirement duringthis phase. Alcoholic beverages are not allowed during this phase.[16]
在此阶段，每天需要饮用八杯水，不允许喝酒精饮料。
The daily drinking water requirement per person is 2-4 litres, but it takes 2 000 to 5 000 litres of water to produce one person's daily food.
每人每天饮用水需要量为2 -4升，但是生产一个人每日口粮所需要的水为2000至5000升。
On the other hand, the continuous increase of water requirement will decrease the waste water plentiful which can be diluted.
另一方面，用水需求的不断增长将使得可用于稀释废水的水量大大的减少。
The water requirement and growth in paddy rice were studied under four different irrigation methods and different evaporation and seepage with pot culture.
利用桶栽试验，研究了在不同灌溉方式及不同蒸发渗漏处理下的水稻需水量和对水稻生长的影响。
In the field we observed that takins licked snows or drank water directly to meet their water requirement.
野外见到羚牛以直接饮水或舔雪的方式来补充对水份的需求。
For the case of operation of single pump-set, the model of water requirement forecast is given.
对于泵站单独运行的情况，给出了用水量的预报模型。
The paper studied water requirement and deficit patterns of watermelon under RDI in arid-hungriness oasis area, Gansu province.
本文就甘肃民勤荒漠绿洲区覆膜西瓜在调亏灌溉条件下的耗水规律与调亏模式进行了研究。
Water requirements were measured by making use of water equilibrium, in the whole growing period and each growing stage to study the relations between millet yield and water requirement.
利用水分平衡法测定谷子全生育期的需水量及各生育阶段的需水量，从而探讨产量与需水量的关系。
This paper introduces the main method to predict industrial water requirement, to analyse totally risk factors in prediction of industrial water requirement.
介绍工业需水量预测的主要方法，综合分析工业需水量预测中的风险因素。
Based on the analysis of field experimental data, crop water requirement and crop coefficient of straw-mulched summer maize are evaluated with dual coefficient approach recommended by FAO.
采用FAO推荐的双作物系数法计算了秸秆覆盖条件下夏玉米的作物系数。
So studying on regularity of water requirement of melon growing in field has important sense to understand the upgrading yield and high quality of melon and raising the utilization ratio of water.
因此，研究甜瓜田间需水规律对理解甜瓜的优质高产，提高水分利用率具有重要意义。
The dynamic of the agricultural soil water is the key issue to regulate the crop water requirement.
农田土壤水分动态是作物需水管理的关键。
The total water requirement for sediment transport in the Lower Yellow River is the reflection of this self adjustment.
黄河下游输沙用水总量是黄河下游河道这种自动调整水沙关系的宏观表现。
Study on the ecology water requirement is the emphasis and difficulty for current water resources management.
生态环境需水量是当前水资源管理等学科研究的重点和难点。
A systematic forecast method for city life water requirement is established, and it has theoretical and practical significance to provide a reference for city water resources programming.
并建立起一套系统的城市生活需水量预测方法，为城市水资源规划提供决策参考，具有理论和实践意义。
Spatial variation of crop water requirement was studied basis on the geo-statistics.
基于地统计学方法分析了灌区作物需水量的空间变异性。
Crop coefficient is the basic parameter for determining crop water requirement.
作物系数是计算作物需水量必不可少的参数。
The eco-environmental water requirement in 2005 was less than that in 2000.
计算结果表明：2005年湿地生态环境需水量较2000年有所减少。
The current research status of ecological and environmental water requirement was summarized.
对国内外生态环境需水量研究现状作了概述。
The research on the ecological water requirement is still at the initial stage, and its connotation has not yet been nailed down.
生态环境需水量的研究还处于起步阶段，对于其内涵尚无统一的界定。
In the third step, the total water requirement should be less than the renewable resources to compensate for the loss of storage resources due to the exploitation in the previous steps.
第三阶段应实现总需水量低于地下水系统补给资源量，使数十年超采造成的储存资源亏空逐年得以偿还。
The practice has proved that the scientific irrigation based on rice water requirement rule can save water and increase yield and gain significant social and economic benefits as well.
实践证明，根据水稻需水的规律进行科学灌溉，不仅可以大量节水，而且还能增产，社会效益和经济效益都十分显著。
It is pointed out that the worsening of soil moisture states inthe level terraced fields cover two parts, i. e. the decrease in soil moisture storage rate, and increase in crop water requirement;
指出，水平梯田水分状况的恶化包括蓄墒率的减小和作物需水量的增大两部分；
It is pointed out that the worsening of soil moisture states inthe level terraced fields cover two parts, i. e. the decrease in soil moisture storage rate, and increase in crop water requirement;
指出，水平梯田水分状况的恶化包括蓄墒率的减小和作物需水量的增大两部分；
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