Question

急用...请高手帮忙分析下面的句子结构，主，谓，宾，表，补...详细一点..

31-1. From a water supply use and management perspective, sustainable water use may be defmed as the use of water resources by people that allow our society to develop and flourish into an indefinite future without degrading the various components of the hydrologic cycle or the ecological systems that depend on it. 从供水系统的使用和管理前景来看，或许可以这样定义可持续用水，即供人们使用的水资源，在没有损害我们所依赖的水文循环和生态系统的各组成部分的前提下，使人类社会发展和繁荣为一个不可估量的未来。
31-2. There is fear thal if we continue our present policies concerning water resources, there will be an increase in incidents of social, economic, and environmental conflicts over water, which are antithetical to sustainable water use. 我们担心如果继续现行的关于水资源的政策，将会造成水与社会、经济以及环境冲突事件的增加，这将会与水的可持续使用背道而驰。
31-3. During dry years, which must be expected even though they may not be accurately predicted, we should have specific strategies to minimize hardships. 枯水期，尽管不能准确也必须预测水资源的储量，我们应该有特定的策略来减少因缺水带来的困难。
31-4. There often is a good deal of controversy concerning water development, and the day of development of large projects in the United States without careful environmental review has passed. 有关水资源的开发总是有许多的争论，美国未经详尽环境审查开发的大规模工程的时代已经过去。
32-1. In 1975, the American Waterworks Association (AWWA) adopted a policy which stated in part that “water is a renewable natural resource, it must be managed to best meet all the many needs of man. Every effective means to prevent and minimize waste and promote wise use should be employed by all entities, public and private, engaged in water resource activities”. 在1975年，美国自来水协会（AWWA）就采取了一项政策，称“水是可再生自然资源，为了更好满足众人的各种的需要必须要管理好它。所有的机构，国家的和个人的都应当使用每项防止和减少水的浪费，促进合理利用水的有效的措施都应当参加到水资源活动中”。
32-2. Generally, water utilities practice conservation by protecting the watersheds in order to realize dependable yields, reducing system leakage and losses, adopting universal metering, encouraging or requiring the installation of devices to reduce water use, implementing public education programs, adjusting water rates to influence demand, and as a last resort, rationing water use during severe shortages. 通常，通过保护流域以获得可靠的收益，减少系统的渗漏和损失、采用通用表计、鼓励和要求减少水用量的装置、贯彻公共教育计划、调整水费以影响需求、最后的手段就是在水严重短缺期间定量配水使用对水设施实施保护。
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