
哪位英语好的好心人帮我翻译一下吧,急急急!!!谢谢啦!不要用金山或google翻的,那个用不成啦 30
YouhavestudiedthepropertiesofwaterinKeyPlumbingPrinciples,sothereisnoneedtogooveritag...
You have studied the properties of water in Key Plumbing Principles, so there is no need to go over it again here, but understanding the properties of water will help you to appreciate why systems are designed the way they are, as well as some of the problems that can occur in systems, for example when water freezes or when limescale deposits are formed when water containing calcium carbonate is heated above 65-70℃
The water that finds its way to our taps is derived from rainfall. Rain water finds its way into rivers, lakes and the sea, where it evaporates forming water vapour and eventually falls as rain again. This continuous succession of events is known as the Water Cycle-more discussion about this can be found later in the unit.
Rain water is relatively pure, but because water is a natural solvent it can dissolve gases in the atmosphere and solids in the ground to form solutions. This means that by the time it eventually reaches natural storage areas, such as reservoirs and lakes, it is unlikely to be pure because it has picked up impurities from either the atmosphere or the ground enroute.
We mentioned earlier that water is sourced from rainfall. The continuous process of water evaporating and condensing from and to earth is called the rain cycle.
The water cycle
Water evaporates from rivers, lakes, the sea and the ground and forms clouds. Clouds contain water vapour which, under suitable climatic conditions condense and fall as rain, as shown in Figure5.3
When rain falls to the ground, some of it flows into streams, river, and lakes, the remainder soaks into the ground, where it collects temporarily and eventually evaporates.
The rain water also percolates through the ground, forming natural springs or water pockets and are referred to as underground sources.
Water Suppliers usually obtain their water for pubic consumption from two main sources:
Surface sources such as: Upland surface water, Rivers and streams.
Underground sources such as: wells, artesian wells, springs.
Water from these sources cannot be supplied directly to the consumer as they are likely to be contaminated, river water being a good example. It is vital that the water is treated first, and that also is the job of the water supplier.
The treatment of water is dependent on where it is sourced from and what impurities it contains.
Water that is sourced from springs and wells is naturally purified, and should need little disinfection.
The quality of water that is sourced from reservoirs or rivers (raw water) will determine the level of treatment. Usually this will involve several stages of treatment including settling, filtering and final polishing with activated carbon grains to remove minute traces of impurities and improve water taste. 展开
The water that finds its way to our taps is derived from rainfall. Rain water finds its way into rivers, lakes and the sea, where it evaporates forming water vapour and eventually falls as rain again. This continuous succession of events is known as the Water Cycle-more discussion about this can be found later in the unit.
Rain water is relatively pure, but because water is a natural solvent it can dissolve gases in the atmosphere and solids in the ground to form solutions. This means that by the time it eventually reaches natural storage areas, such as reservoirs and lakes, it is unlikely to be pure because it has picked up impurities from either the atmosphere or the ground enroute.
We mentioned earlier that water is sourced from rainfall. The continuous process of water evaporating and condensing from and to earth is called the rain cycle.
The water cycle
Water evaporates from rivers, lakes, the sea and the ground and forms clouds. Clouds contain water vapour which, under suitable climatic conditions condense and fall as rain, as shown in Figure5.3
When rain falls to the ground, some of it flows into streams, river, and lakes, the remainder soaks into the ground, where it collects temporarily and eventually evaporates.
The rain water also percolates through the ground, forming natural springs or water pockets and are referred to as underground sources.
Water Suppliers usually obtain their water for pubic consumption from two main sources:
Surface sources such as: Upland surface water, Rivers and streams.
Underground sources such as: wells, artesian wells, springs.
Water from these sources cannot be supplied directly to the consumer as they are likely to be contaminated, river water being a good example. It is vital that the water is treated first, and that also is the job of the water supplier.
The treatment of water is dependent on where it is sourced from and what impurities it contains.
Water that is sourced from springs and wells is naturally purified, and should need little disinfection.
The quality of water that is sourced from reservoirs or rivers (raw water) will determine the level of treatment. Usually this will involve several stages of treatment including settling, filtering and final polishing with activated carbon grains to remove minute traces of impurities and improve water taste. 展开
2个回答
展开全部
你有研究性质的水,在水管的关键原则,因此没有必要去超过它再次在这里,但了解的属性的水会帮助你明白为什么系统的设计方式,以及一些对问题可能出现的系统,例如,当水,冻结或当limescale存款时形成的水含有碳酸钙的是激烈的上述65-70 ℃
水认定,其方法我们的水龙头是来自降雨。雨水认定其进入河流,湖泊和大海,而蒸发,形成水蒸汽,并最终落在雨。这连续继承的事件是被称为水循环-更多的讨论,这可以找到后来在单位内。
雨水是比较单纯的,而是因为水是一个很自然的溶剂,可以溶解气体在大气层和固体在地面上形成的解决方案。这意味着,由时间,最终达到自然存放的地区,如水库和湖泊,这是不太可能纯粹的,因为它拾起杂质无论从大气层或地面enroute 。
我们刚才提到,水是来源于降雨。不断的过程中水的蒸发和冷凝,并从地球上被称为雨周期。
水循环
水蒸发,从河流,湖泊,海上和地面和各种形式的云彩。云中含有水蒸汽,根据合适的气候条件,凝聚和秋天下雨,显示在figure5.3
当雨水落在地面上,有些它流入溪流,河,湖泊,其余的吸收进入地面,在那里收集暂时并最终蒸发。
雨水也percolates通过地面,形成天然泉水或水的口袋,和被称为地下的来源。
水的供应商通常是获取他们的水供市民消费,从两个主要来源:
地表水源,如:旱地地表水,河流和溪涧。
地下来源,如:井,自流井,泉水。
水从这些来源,不能直接供应给消费者,因为他们很可能受到污染,河水被一个很好的例子。这是至关重要的是,水是治疗第一,这也是抓好水的供应商。
治疗水是依赖于何处,这是来源于什么杂质,它包含。
水是来自泉水和水井是自然纯化,并应需要很少消毒。
水的质量是来自水库或河流(原水)会决定处理水平。通常这将涉及到几个阶段的治疗,包括解决,过滤和最后抛光与活性炭颗粒,以消除分钟的痕迹,杂质和改善水的口味。
水认定,其方法我们的水龙头是来自降雨。雨水认定其进入河流,湖泊和大海,而蒸发,形成水蒸汽,并最终落在雨。这连续继承的事件是被称为水循环-更多的讨论,这可以找到后来在单位内。
雨水是比较单纯的,而是因为水是一个很自然的溶剂,可以溶解气体在大气层和固体在地面上形成的解决方案。这意味着,由时间,最终达到自然存放的地区,如水库和湖泊,这是不太可能纯粹的,因为它拾起杂质无论从大气层或地面enroute 。
我们刚才提到,水是来源于降雨。不断的过程中水的蒸发和冷凝,并从地球上被称为雨周期。
水循环
水蒸发,从河流,湖泊,海上和地面和各种形式的云彩。云中含有水蒸汽,根据合适的气候条件,凝聚和秋天下雨,显示在figure5.3
当雨水落在地面上,有些它流入溪流,河,湖泊,其余的吸收进入地面,在那里收集暂时并最终蒸发。
雨水也percolates通过地面,形成天然泉水或水的口袋,和被称为地下的来源。
水的供应商通常是获取他们的水供市民消费,从两个主要来源:
地表水源,如:旱地地表水,河流和溪涧。
地下来源,如:井,自流井,泉水。
水从这些来源,不能直接供应给消费者,因为他们很可能受到污染,河水被一个很好的例子。这是至关重要的是,水是治疗第一,这也是抓好水的供应商。
治疗水是依赖于何处,这是来源于什么杂质,它包含。
水是来自泉水和水井是自然纯化,并应需要很少消毒。
水的质量是来自水库或河流(原水)会决定处理水平。通常这将涉及到几个阶段的治疗,包括解决,过滤和最后抛光与活性炭颗粒,以消除分钟的痕迹,杂质和改善水的口味。
展开全部
你有研究性质的水,在水管的关键原则,因此没有必要去超过它再次在这里,但了解的属性的水会帮助你明白为什么系统的设计方式,以及一些对问题可能出现的系统,例如,当水,冻结或当地势时形成的水含有碳酸钙的是激烈的上述65-70 ℃
水认定,其方法我们的水龙头是来自降雨。雨水认定其进入河流,湖泊和大海,而蒸发,形成水蒸汽,并最终落在雨。这连续继承的事件是被称为水循环-更多的讨论,这可以找到后来在单位内。
雨水是比较单纯的,而是因为水是一个很自然的溶剂,可以溶解气体在大气层和固体在地面上形成的解决方案。这意味着,由时间,最终达到自然存放的地区,如水库和湖泊,这是不太可能纯粹的,因为它拥有杂质无论从大气层或地面实质。
我们刚才提到,水是来源于降雨。不断的过程中水的蒸发和冷凝,并从地球上被称为雨周期。 水循环
水蒸发,从河流,湖泊,海上和地面和各种形式的云彩。云中含有水蒸汽,根据合适的气候条件,凝聚和秋天下雨,会在Figure5.3上显示出来.
当雨水落在地面上,有些它流入溪流,河,湖泊,其余的吸收进入地面,在那里收集暂时并最终蒸发。
雨水也通过地面,形成天然泉水或水的口袋,和被称为地下的来源。
水的供应商通常是获取他们的水供市民消费,从两个主要来源:
地表水源,如:旱地的地表水,河流和溪涧。
地下来源,如:井,自流井,泉水。
水从这些来源,不能直接供应给消费者,因为他们很可能受到污染,河水就是一个很好的例子。最是至关重要的是,水被净化是第一步,这也是抓好水的质量的供应商。
治疗水是依赖于何处,这是来源于什么杂质,它包含。
水是来自泉水和水井是自然纯化,并应需要很少消毒。
水的质量是来自水库或河流(原水)会决定处理水平。通常这将涉及到几个阶段的治疗,包括解决,过滤和最后抛光与活性炭颗粒,以消除分钟的痕迹,杂质和改善水的口味。
水认定,其方法我们的水龙头是来自降雨。雨水认定其进入河流,湖泊和大海,而蒸发,形成水蒸汽,并最终落在雨。这连续继承的事件是被称为水循环-更多的讨论,这可以找到后来在单位内。
雨水是比较单纯的,而是因为水是一个很自然的溶剂,可以溶解气体在大气层和固体在地面上形成的解决方案。这意味着,由时间,最终达到自然存放的地区,如水库和湖泊,这是不太可能纯粹的,因为它拥有杂质无论从大气层或地面实质。
我们刚才提到,水是来源于降雨。不断的过程中水的蒸发和冷凝,并从地球上被称为雨周期。 水循环
水蒸发,从河流,湖泊,海上和地面和各种形式的云彩。云中含有水蒸汽,根据合适的气候条件,凝聚和秋天下雨,会在Figure5.3上显示出来.
当雨水落在地面上,有些它流入溪流,河,湖泊,其余的吸收进入地面,在那里收集暂时并最终蒸发。
雨水也通过地面,形成天然泉水或水的口袋,和被称为地下的来源。
水的供应商通常是获取他们的水供市民消费,从两个主要来源:
地表水源,如:旱地的地表水,河流和溪涧。
地下来源,如:井,自流井,泉水。
水从这些来源,不能直接供应给消费者,因为他们很可能受到污染,河水就是一个很好的例子。最是至关重要的是,水被净化是第一步,这也是抓好水的质量的供应商。
治疗水是依赖于何处,这是来源于什么杂质,它包含。
水是来自泉水和水井是自然纯化,并应需要很少消毒。
水的质量是来自水库或河流(原水)会决定处理水平。通常这将涉及到几个阶段的治疗,包括解决,过滤和最后抛光与活性炭颗粒,以消除分钟的痕迹,杂质和改善水的口味。
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