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At the end of this paper, we will give seller's optimal buy-price The first chapter of this paper is the traditional auction, including the common values model, private valuable model, and the revenue equivalence theorem.

第四章我们在前面的模型基础上分析投标者的收益和卖者的收益，证明了投标者风险规避程度越高，其阀值会越小，并且指出当一口价满足一定条件时，风险中性的投标者不能从一口价拍卖中获得额外的收益，同时、卖者可以获得不低于普通英式拍卖的收益。

It would also help to obtain integrity trajectories of saltating sand grains by extending bitty saltating trajectories grained from wind tunnel experiment in order to understand deep sand grain saltating motion.

这项研究为跃移沙粒运动参数分布函数研究提供了一条新思路，有助于将风洞实验获得的沙粒跃移运动的片断轨迹拓展，进而获得沙粒跃移运动的整个轨迹，以便深入理解沙粒跃移运动。

The vertical distribution of Aeolian sand current Based on the distribution function of lift-off velocity of saltating sand grain, this thesis develops a vertical distribution model of Aeolian flow linking with the number of lift-off sand grains percent time percent sand area. The thesis realizes the combination of microcosmic researches and macroscopical researches of Aeolian wind sand and solves primarily the isjunction of microcosmic researches and macroscopical researches.

4风沙流的垂向分布以本文获得的沙粒起跳初速度分布函数为纽带，结合本文获得的单位时间单位面积沙床起跳沙粒数，建立风沙流的垂向分布模型，实现风沙运动宏观研究和微观研究相结合，初步解决长期以来宏观与微观研究相脱节问题。

The number of lift-off sand grains percent time percent sand bed area Based on the lift-off velocity distribution function of saltating sand grain, this thesis gains the number of lift-off sand grains percent time percent sand bed area which ranges from 6796 to 8846900 number/(s·m2) by combination motion model of single saltating sand grain and some motion parameters of saltating sand grains and the flux of wind sand current from wind tunnel experiment.

单位时间单位面积沙床起跳沙粒数利用本文获得的沙粒起跳初速度分布函数，结合沙粒跃移运动学模型以及风洞实验中获得的沙粒跃移运动参数以及输沙量，反演出一定风场条件下单位时间单位面积沙床起跳沙粒数，变化范围6796-8846900个/(s·m2)，并满足。

In order to overcome the difficulties faced on analytically deriving the equation for describing the samll angle light scattering patterns from anisotropic objects with arbitrarily director configurations, a Fast Fourior Transformation algorithm for the calculation of SALS patterns from the anisotropic objects immersed in an isotropic matrix has been developed.

用快速傅里叶变换计算方法( Fast Fourier Transformation，FFT)直接获得高分子材料中介观有序结构小角激光光散射图案，从而对实验获得的球晶和液晶液滴的 SALS图案进行结构预测。

The importance that experience study value not lie in pass to master a certain operation method, acquire a certain technical ability, but lie in each person to acquire in the activity of for actuality of true feeling, this kind of heart experience is a formation understanding, convert for behavior of motive force society practice to contribute to the theories contact physically, practice and exaltation actual operation ability of the oneself.

体验学习的重要价值不在于通过学会某种操作方式，获得某种技能，而在于每一个人在活动中获得的对于现实的真实感受，这种内心体验是形成认识、转化为行为的原动力社会实践有助于理论联系实际，锻炼和提高自身的实际操作能力。

RoMAS defines every role must be played by one agent class at least and it allows a Agent to be played by more than one role,so the design models which include the Agent Class Diagram, the Behaviors State Diagrams, and the Communication Class Diagrams becomes more complex .

为了解决该设计工作的复杂性，人们希望设计转换系统，自动转换分析模型成为设计模型，这样，若要获得正确的可执行代码，至少可在分析阶段就能获得保证。

Comparisons are easily done Once you've had a taste of perfection Like an apple hanging from a tree I picked the ripest one I still got the seed You said move on Where do I go I guess second best Is all I will know Cause when I'm with him I am thinking of you Thinking of you What *you* would do if You were the one Who was spending the night Oh I wish that I Was looking into your eyes You're like an Indian summer In the middle of winter Like a hard candy With a surprise center How do I get better Once I've had the best You said there's Tons of fish in the water So the waters I will test He kissed my lips I taste your mouth He pulled me in I was disgusted with myself Cause when I'm with him I am thinking of you Thinking of you What you would do if You were the one Who was spending the night Oh I wish that I Was looking into...

凯蒂杰拉佩里-想你比较容易做一旦您已经有味道的完美像一个苹果从树上挂我挑选了一个成熟我仍然获得种子你说的前进我在哪里去我想第二个最好的就是我也知道原因当我与他我想到了你你的思考你会做什么，如果你是一个谁是过夜噢我想，我在寻找到你的眼睛你像一个印度夏季在隆冬时节像硬糖果随着奇怪中心我如何获得更好的一旦我有最好的你说有吨鱼在水中因此，我将测试水域他吻我的嘴唇我可以品尝你的嘴他把我的我很反感自己原因当我与他我想到了你你的思考你会做什么，如果你是一个谁是过夜噢我想，我正在调查。。。

Comparisons are easily done Once you've had a taste of perfection Like an apple hanging from a tree I picked the ripest one I still got the seed You said move on Where do I go I guess second best Is all I will know Cause when I'm with him I am thinking of you Thinking of you What *you* would do if You were the one Who was spending the night Oh I wish that I Was looking into your eyes You're like an Indian summer In the middle of winter Like a hard candy With a surprise center How do I get better Once I've had the best You said there's Tons of fish in the water So the waters I will test He kissed my lips I taste your mouth He pulled me in I was disgusted with myself Cause when I'm with him I am thinking of you Thinking of you What you would do if You were the one Who was spending the night Oh I wish that I Was looking into...

凯蒂杰拉佩里-想你比较容易做一旦您已经有味道的完美像一个苹果从树上挂我挑选了一个成熟我仍然获得种子你说的前进我在什么地方去我想第二个最好的就是我也清楚原因当我与他我想到了你你的思考你会做什么，如果你是一个谁是过夜噢我想，我在寻找到你的眼睛你像一个印度夏季在隆冬时节像硬糖果随着奇怪中心我如何获得更好的一旦我有最好的你说有吨鱼在水中因此，我将测试水域他吻我的嘴唇我能品尝你的嘴他把我的我很反感自己原因当我与他我想到了你你的思考你会做什么，如果你是一个谁是过夜噢我想，我正在调查。。。

Since the 1997 release of the first novel Harry Potter and the Philosopher's Stone, which was retitled Harry Potter and the Sorcerer's Stone in the United States, the books have gained immense popularity, critical acclaim and commercial success worldwide.

自第一本小说1997年发行哈利波特与魔法石；这是改名；在美国哈利波特与魔法石；书获得了巨大的知名度；获得的好评和全球商业上的成功。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。