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In order to find out completely the soil-wheat contaiminated by heavy metals in Tianjin sewage farm, we collect samples on the dry land and examinate contents of heavy metals in soil-wheat system. Firstly, the anthor evaluates that soil irrigated by sewage that has been contaminated slightly, the main polluting factors are Cd and Zn, and then the anthor evaluates soil according to different regions, soil types and irrigating water. Secondly, the anthor analyzes content and enrichment ability of heavy metals in different part of wheat, evaluates wheat is contaiminated by Cd widespreadly, only few samples polluted by Zn.Finally the anthor put up correlative analysis about heavy metal contents in the soil-wheat system, as well as plant enrichment coefficient and some physico-chemical properties of soil, and establishes a prognostic model about heavy metal content among wheat spike, soil, soil types, PH, organic matter and salinity with the quantifying theory.The prognostic accuracy of primarily contaminative factors is the best with compound correlative coefficient examining, the model can be founded.With improvement of living level, people need cleaner food.

为全面了解天津市污灌区农产品生产地土壤和旱地作物小麦的重金属污染状况，我们于2004～2005年对全市污灌区的土壤和小麦进行了采样，在对该区土壤—小麦系统中六种重金属元素(Cd、Cu、Pb、Zn、Cr和Ni)的含量进行检测的基础上，本文首先分析评价了污灌区农田土壤的环境质量总体已达到了轻度污染水平，主要的污染因子是Cd和Zn，同时对污灌区农田土壤分区县、土壤类型和不同灌水类型进行了评价；然后分析了重金属在小麦不同部位的含量与富集能力，评价了污灌区旱地作物小麦普遍遭受了Cd的污染，只有个别样点遭受了Zn的污染；最后对土壤—小麦系统重金属含量间以及植物富集系数与土壤部分理化性质间进行了相关分析，由于土壤类型是定性变量，本论文以数量化理论建立了小麦穗实中重金属含量与土壤中重金属全量、土壤类型、PH值、有机质和全盐量间的预测模型，经复相关系数检验，污灌区主要的污染因子Cd和Zn的预测精度最高，模型可以成立。

Firstly, to do some recommended system builders and not good at exam or market examinee a fair chance.

首先，推荐制对一些确实拔尖而不擅长考试或发挥市场的考生一次公平的机会。

Firstly, the paper introduces reform of port management system and discusses the main ideas, development and the effect on the port building of the exist system. Based on that the topic of the paper -excess investment trend (similar function and excess supply of port) and the reasons are discussed.

首先，通过对我国港口管理体制沿革的介绍，引出现阶段港口管理体制改革的主要思路、进程及对港口建设的影响，提出本文研究的主要问题是港口管理体制改革中的过度投资趋势，并把港口发展目标中功能定位重复，港口市场未来的供给超过未来的需求界定为出现港口过度投资趋势，探讨了过度投资趋势出现的主要原因。

The multi-routes k-opt exchange algorithm is firstly proposed, which is the extension in multi-routes of the traditional k-opt exchange algorithm, where the points exchanged are not only the ones in a single route but also in several routes.

本文首先提出了多路径 k-opt交换方法，该方法是传统k-opt交换方法用于多路径间的扩展，其进行交换的点不再局限于单一路径内部，而是多个路径的点都可以参入交换。

In order to ensure the accuracy of the match. Firstly the disparity gradient restriction across the direction of epipolar lines is used, and then on the basis of exclusionism searched the corner information close to edge point to guide the matching with restricted corners-searched range. The final match results ensure that the matching pairs in two images are one-to-one correspondences.

为了保证匹配的准确性，首先引入极线方向上的视差梯度约束，然后在考察唯一性的基础上，通过搜索并考察边缘端点周围的角点信息来引导边缘的匹配，并且限定边缘端点的角点搜索范围，最终匹配结果保证了两幅图像中的匹配对是一对一的唯一对应。

Firstly the exerciser must find a comfortable position on top of the ball.

首先，锻炼者要在健身球上找个舒适的坐点。

Nietzsche"s political philosophy is not piled up a dish of messy sand by maxim form, the writer thinks that Nietzsche"s political construction has his continuous logicality. It"s an expression of political philosophy that is constructed on the base of force will and life will, it makes life reach at a transitional bridge that can supply condition for the salvation of art. Thus, there are three understandings here. Firstly, politics is an objective expression of power will, also is an external expression of power will. The real politics depends on power will and services to their requirement and regulation; Secondly, the life faces on the double crises, on the one hand, the life falls into denial of Christian morality. Morality of Christianity presumes another world that life never touch for. This is world of soul belief and pursue, meanwhile, life is depreciated and degenerated as "evil", so the value of life suffers from misunderstanding and denial. Things of presence are subverted as things of exeunt."Uprising of slave in morality" results in the denial of ",master morality, at the same time, although modern democratic politics that based on morality of Christianity makes person return secular life and makes life identity and trite. This kind of politics creates privation of special vulture and race. On the other hand, internal requirement of power will results in the crisis of life because the characteristics of power will is continuous making and destroy.

尼采的政治哲学并非是以格言形式堆积而成的一盘散沙，笔者认为，尼采的政治建构有其一贯的逻辑性，体现为其政治哲学是建构在强力意志或生命意志基础上的并使生命达至艺术拯救提供条件的一座过度性桥梁，对此有三层理解：首先政治是权力意志的一种客观体现，是全力意志的一种外化，真正的政治必须立足于权力意志之上并服务于其要求和规定；其次，生命面临着双重危机，一方面，生命陷入基督教道德的否定之中，基督教道德设定了一个生命遥不可及的彼岸世界，这是灵魂信仰和追求的世界，同时生命被贬堕为"恶"，这样，生命的价值遭到误解和否定，在场的事物被颠覆为退场的事物，"主人道德"被否定，这是"道德上的奴隶起义"的结果，同时基于基督教道德之上的现代民主政治虽然使人回到了尘世，但是又将生命齐一化和平庸化，造成特殊文化和特殊种族的缺位，而正是这种文化和这种种族才能真正地肯定生命；另一方面，生命的危机是权力意志内在的要求所致，因为权力意志的一个特质就是连续地生成和毁灭，就生命本身就是权力意志而言，毁灭就是其必然的命运。

Firstly, introduces some basic concepts and theory about exchange rate risk and discusses the significance and exigency of study exchange rate risk management in corporation of china.

因此本文选择《当前中国外向型企业汇率风险管理研究》为题，从介绍汇率风险的基本的定义和分类及汇率预测的基本概念出发，分析了当前情况下，我国外向型企业汇率风险管理的现状，及其产生这些情况的原因；其次，重点从完善公司经营方面和应用金融及其衍生工具方面，分析了外向型企业汇率风险控制的主要方法和手段，并对各种方法进行了评价。

Firstly, this dissertation introduces the present situation of IP networks management, and analyzes existent problem.

本文首先简要介绍了IP网络管理的现状，分析了存在的问题。

Firstly, it analysis and summarizes the existent virtual reality technology.

首先对现存的虚拟现实技术进行分析和总结。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。