水土

He practiced crop rotation and soil conservation a century before these became standard practice,and he invented a plow superior to any other in existence.

他练轮作和水土保持在这些成为惯例得一世纪前，他发明了犁优于其他任何其他影响建筑的发展。

Phytoremediation is defined as the use of plants to decontaminate and/or remove pollutants from the environment.

植物修复技术因其高效低耗、保持水土和美化环境等特点，已引起国际土壤——植物营养学界和环境科学界的浓厚兴趣和政府部门的高度重视，有望成为一项具有广阔应用前景的治理重金属污染土壤的全新技术。

The main cause of soil erosion is deforestation .

水土流失的主要原因是滥伐森林。

In fact there are many factors threaten the existence of human, such as: forest demolishment, soil deserted, the destroy of ozonosphere, the increasement of ultraviolet radiation; global wcermerth and the raise of sea level caused by carbon dioxide and so on.

事实上，森林毁坏，水土流失，土地沙漠化，臭氧层的破坏，二氧化碳等气体增多，酸雨蔓延，水生生态破坏，水污染和水枯竭，物种灭绝等等，使全人类面临来自海、陆、空全方位环境退化的威胁。

The process of ecological degradation in the vicinity of Shaoguan Pb/Zn smelter may be summed as: heavy metals and acidic deposits from the waste gas from smelter resulted in the vanishment of the sensitive plant species, increasing accumulation of heavy metals in soils and acidification of topsoil worsened the chemical properties and then shallow-rooted plant, mainly the herbaceous, vanished. With the demolishment of the vegetation cover, increasing water-soil erosion worsened physico-chemical properties of soil and, subsequently, some woody plants disappeared and barren land was finally appeared.

该生态系统的退化过程可以归纳为：来自于冶炼废气的重金属和酸沉降导致了敏感植物的消亡，丧失了对土壤的缓冲保护作用；重金属在土壤表层的积累，酸性物质在土壤表层的增加导致的土壤酸化以及由此引发的有机质与养分的淋溶和重金属及Al的活性增加，加剧植被的快速退化，特别是浅根植物的衰亡；地被层的破坏，导致水土流失和土壤侵蚀加深，进一步恶化表层土壤的理化性质，一些木本植物随之消失，最终形成光板地。

Problems in China's land ecology security in China involve soil erosion, soil pollution, soil desertification, salinization, alkalin-ization, soil depauperization, etc.

我国土地生态安全方面的主要问题有水土流失、土壤污染、土地沙漠化、盐碱化、潜育化、沼泽化、贫瘠化等，围绕这些土地生态问题，我国已经制订了《环境保护法》和《土地管理法》等综合性法律，又制订了有关的专项法规。

First of all, as the forests disappeared, the propagation decreased, while some kinds of plants and animals were even close to deracination or had already died out. Next, the natural disasters, such as flood, drought, and tornado, etc. broke out more frequently and strongly. Again, without the protection by forests, soil erosion and fertility decline together with other problems appeared. Finally, forest vicissitude also had negative effect to social economy and people's lives.

首先是由于森林面积的减少，导致一些森林动植物的数量减少，濒临灭绝，甚至消失；其次，森林的变迁导致海南岛水灾、旱灾和风灾等自然灾害发生次数增加，强度加大；再次，土地失去森林的保护而引发严重的水土流失和土壤肥力下降等种种问题；最后，森林的变迁还对社会经济及人们的生活产生不利的影响。

For a long period of time, widely used in the production of components of an effective insecticide rotenone is mainly from the genus Derris root extract, collect rotenone from the root to dig down to two meters deep, the human cost of not only high-cost and easy caused by soil erosion, many of the genus Derris production has stopped growing, leading to the market with rotenone as the main active ingredient of the biological pesticide manufacturers shortage of raw material sources.

相当长一段时间，在生产上广泛使用的有效杀虫成分鱼藤酮主要是从鱼藤属植物中的根部提取，采集鱼藤酮的根要挖掘至地下达两米深，不仅人力成本耗费高，而且容易造成水土流失，不少鱼藤属植物的产区已经停止种植，导致市场上以鱼藤酮为主要活性成分的生物农药制造企业原料来源短缺。

Based on space allocation map of land and water resources carrying capacity of Zhumadian City in 2020, we can descry that water and land resources carrying capacity of Zhumadian City in the future declines from the south-west to east-north, which accord with the spatial distribution of water resources of Zhumadian city.

更多，2020年驻马店市水土资源承载能力是从区域的西南部向东北部递减，这也正好与驻马店市水资源的空间分布是一致的；同时，说明在驻马店市未来发展过程中，相对土地资源来说，水资源的制约作用更大一些。

At the new period, the successful the writer the that attracts the by the and the describes one the square the Water the and soil the that the oneself the fall in the love the not the in the minority, the be the like the company the of the even the and the cave style the of writing the state series," the high northeast of the country" that Moyan, the LI3 RUI4's" the go the mountain too", peninsular" WaLizhen " the of east the of ZHANG the WEI3 JIAO, what WANG2 AN YI4 build is flexible to work properly etc. that the dynamic civilian turns big Shanghai, all giving person leave the impression of the hard detrition again.

在新时期以来，着意与描写自己所钟情的一方水土的成功作家并不在少数，像贾平凹笔下的商州系列，莫言的"高密东北乡"，李锐的"太行山"，张炜胶东半岛的"洼狸镇"，王安忆朔造的鲜活灵动的平民化大上海等，都给人又留下了难以磨灭的印象。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。