水源

The evolution of salinity content in soil and phreatic water in Qingtongxia irrigation area, Ningxia Atonomous Region, China, was analyzed according to the monitoring data in 40 years.

银川平原得益于其东缘的过境黄河提供的丰富水源，从秦汉时代至今引黄灌溉已经历了两千多年的历史。

The Physalia is a self-sufficient ecosystem that generates all the power it needs from the sun and works to reduce water pollution through bio-filtration .

这个巨型浮囊内部有一套自给自足的生态系统，其利用太阳产生自身所需的能源，并通过生物过滤来减少水源污染。

The jeopardy and ponderancy of NPS is rising with the developing capability of point source pollution control. It comprehensively introduces the current situation of NSP research at home and abroad, analyzes and compares the exploration methods of NSP.

非点源污染直接影响人类生存的环境质量，污染饮用水源，引起水体的富营养化，破坏水生生物的生存环境，造成土壤生产能力和水质的下降，严重影响人民生产、生活质量和福利水平的高低[1-3]。

It is mainly used in pipeline of water works, power generating plant, steel metallurgy, paper making, chemical-industries and water aource projects and the construction of envirnment installations, especially suitable suitable for flow adjusting and shutting off in water popeline.

软密封蝶阀主要用于水厂、电厂、钢铁冶炼、造纸、化工、水源工程、环境设施等系统管路上，尤其适用于水道管路上，作为调节流量和截断设备使用。

The reason for this was,first,that the Nile brought water to a rainless desert and,second,that once a year,the river overflowed it anks,leaving,as the water went back,a new layer of fertile soil.

其中的原因首先是尼罗河为少雨的沙漠带来水源，其次，每一年，尼罗河都会泛滥，当水退会河中时，留下新一层肥沃的土地。

The reason for this was,first,that the Nile brought water to a rainless desert and,second,that once a year,the river overflowed it anks,leaving,as the water went back,a new layer of fertile soil.

这其中有两个原因：其一，尼罗河为干旱的沙漠带来了水源；其二，每年，尼罗河水都会溢出河岸，流走；水再次退回河中，肥沃的土地形成了。

The carrying capacity of water resources and water environment in Yellow River basin is faced with a huge challenge, such as vegetation destruction, water and soil erosion, riverbed run-up, watercourse shrinkage, water shortage, frequency breakage flow, severity pollution, water quality deterioration, trace to the source and sendiment, coast erosion and regradation.

植被破坏、水土流失，河床抬高、河道萎缩，水源匮乏、频繁断流，污染严重、水质下降，朔源淤积、海岸蚀退等表明黄河流域水资源与水环境的承载能力面临着极大的挑战。

Foam aerosol disinfectants have many advantages, which can strongly adhere to slippy surface, with less drug dosage, no waterneeded. Foam preparations can be used especially to decontaminate the surfaces of vehicle、 floor and building wall.

泡沫剂型有许多优点，对光滑表面的附着能力强，药物用量少，无需水源，节约成本，特别适合应用于对车辆表面、地面、建筑物墙壁等物品表面的消毒。

Use as low salt-laden water source as possible during the first 3-4 weeks after Sprigging and up to 2-3 weeks after sodding.

在出苗后3-4周内和铺草皮后2-3周内应用含盐量低的水源。

Check for service water entering system from any other source such as a defective tankless heater.

从任何其他水源（如有问题的即热式热水器）查看进入系统的生活用水。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。