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The backflow preventer must be supported and is not designed to carry full weight of the stand pipe.
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防回流阀必须有所支撑，不能用于承载立管的全部重量。 |
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The background and motivation of the soft computing's presenting might be: as the issues people face in social development, producing and scientific research are getting more and more difficult, meanwhile the degree of uncertainty of social and natural en
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摘要论述了软计算方法提出的背景和动因在于：随著人类面临的社会发展、生产生活、科学研究中的决策、控制、优化、规划、制造等问题的日益复杂，所处的人文、自然环境的不确定程度与日俱增，历史上基于微积分的解决之道已越来越不能单独承担处理不确定环境下复杂系统的重任。 |
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The background changed to Gaoximu's house.
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（背景转到高西木的房子。） |
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The background doorway frames his figure against the view of the countryside as his hands point silently to the bread and wine.
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背景中的门口框架出他的身影，和门口外的乡间风光形成对比，而他的手寂静地指向面包和酒。 |
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The background of Yangtze River Delta talent resource distribution includes the level of economic development of deferent area in Yangtze River Delta, the level of citizen income and social security, the population, employment, students scale, the distric
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影响长三角人才资源分布背景因素主要包括长三角区域内部经济发展水平、居民收入水平、社会保障水平等经济背景原因；长三角区域内部人口发展现状、就业人口现状、在校学生规模等人口背景因素以及行政区划、行政分割、人事政策差异等政策因素。 |
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The background of electric power dispatching data network, technical structure, the application situation and the security prevention principle of Huainan grids secondary system were expounded.
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摘要本文主要阐述了淮南电力调度数据网络建设的背景、技术体制、网络结构、应用情况以及电力二次系统防护。 |
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The background of my screen is a vivid green.
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我电脑屏幕的桌面背景是鲜绿色，上面排着七张色彩鲜艳的纸牌。 |
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The background of web pages is white by default, like a sheet of paper.
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背景色魔人是白色的，就像一张纸。 |
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The background of “Introduction” is a classical string quartet playing to the chord changes of the album's last song, “You Can Tell Me”.
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《序曲》的背景音乐是古典的弦乐四重奏，演奏的是专辑里最后一首歌「你可以告诉我」的和弦转音。 |
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The background to make the difference was that the government required the local officials and the central officials at leisure to mutually move when planning the moving model for the bureaucrats.
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产生这两个特点的背景是，王朝在设计官僚迁转模式时，要求地方官与中央散官互相“对流”。 |
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The background to the issues related to food safety is briefly introduced and placed in the context of world trade with particular reference to developing countries.
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介绍了有关食品安全问题的背景，并将这一背景放在了世界贸易、尤其是发展中国家世界贸易的大环境下考察。 |
