农田

Reform existing market access system, Implement of quantitative classification management system for food hygiene supervision, carry out Good Manufacturing Practice and Hazard Analysis and Critical Control Point management system; perfect laws and regulations of food safety, safety standard, Food inspection and testing system; Building-up superintends system from farmland to dining-table entire proceeding, ensures that people is felt relieved about food to safety.

借鉴国外先进监管经验，加强我国的食品安全监管，必须做到：改革现有的监管体制，建立完善的食品安全监管体系；改革现有的市场准入制度、实施食品卫生监督量化分级管理制度、推行良好生产规范管理和危险分析关键控制点技术管理体系；完善食品安全法律法规、安全标准、检验检测体系；建立从农田到餐桌全过程监督制度，确保人们吃到安全放心食品。

In this paper, the principle and the method of the discrete time Markou Decision Programming have been used for the MDP model of irrigating the crop field.

本文应用离散时间的马尔可夫决策规划的原理和方法，建立了农田灌溉的MDP模型。

Based on the Sino-US Forest Health Cooperation Program, along with review on lots of foreign and domestic literatures, the historical trends of attributes of forest and the concept of health in the modern society are discussed and the concept of forest health is redefined, combining the methods of logic discursion with demonstration analysis, qualitative analysis with quantitative analysis and the ecology with other related science from point view of macro and middle scope aspects.

本研究依托中美森林健康试验示范区建设，结合大量的国内外文献分析，从中观和宏观角度，采用逻辑推理与实证分析、定性分析与定量分析、生态学和其他学科相结合等方法，讨论了森林属性的历史演变和现代健康观，对森林健康进行了重新的定义，首次尝试建立了基于中国林情的森林健康基本理论体系，构建了森林健康的评价方法，结合文献研究对城市森林、农田防护林、马尾松林、笋用雷竹林的健康评价进行了理论验证，并通过江西信丰崇墩沟流域森林健康评价进行了案例分析。

But most natural forests were transformed into the artificial cultivated ecosystem—such as farmland, orchard, tea garden, economic forest, artificial forest, and others-which was result from the managing action by mankind such as disforest and reclamation, building plantation. It presented diversification of forest ecosystem conversion mode.

在历史上，中亚热带山地生态系统的自然植被基本上为天然常绿阔叶林，但由于人类的经营活动(如毁林开辟耕地、营造人工林等)，大部(来源：A85BC论文网www.abclunwen.com)分天然林已转变为人工栽培用途的生态系统(如农田、果园、茶园、经济林、人工林等)，呈现出多样化的森林生态系统转换模式。

In addition, Beijing is surrounded by mountains that prevent pollutants from dispersing and is subject to severe sandstorms.

中国多达10%的农田被污染；大约7亿中国人的饮用水中含有污物。2007年，中国取代美国成为全球最大的温室气体排放国。

Inverse Distance Weighted method is sensitive to the distance and circle distributions are found around sampling point. IDW is an accurate interpolation method in case of the field information diffused from some center points.

距离反比法插值对距离比较敏感，出现很多以采样点为中心的圆形分布，在以点为中心呈扩散状分布的农田信息，采用距离反比法具有较好的插值效果。

Such as the standard of land use classification has differs greatly in present situation, the land information is distempered, capital farmland has not related to the land block yet. And furthermore, the land management means is getting behind.

土地利用现状分类的标准不统一；土地信息不健全，基本农田还没有落实到地块上；地籍管理手段落后，信息化程度低等。

Preparation of Fricke dosimeter and normalization of dose field.

农田使用粉煤灰的放射性安全性评价。

In North America, controlled drainage is considered as one of the best agricultural management practices.

在北美，控制排水被认为是农田最佳管理措施之一。

Maps of monthly potential evapotranspiration could also be generated indirectly through maps of monthly averaged air temperature and global solar radiation produced by using geostatistics. These maps were useful to in making irrigation plans and designing response strategies to droughtiness.

利用地理统计技术将气象测站量得之月平均气温和日射量资料面化后，可间接得出原本无法面化之潜在蒸发散量的时空分布资讯，是拟定农田灌溉计画和因应土壤乾旱对策的重要资讯。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失