不复杂的

For a general parametric curve/surface, we usually cannot compute its exact implicit form. Even though its exact implicit form can be computed, the curve/surface implicitization involves relatively complicated computation and the degree is higher. Moreover, it may have unexpected components and self-intersections. All these unsatisfied properties limit the applications of the exact implicitization. So finding curve/surface approximate implicitization has become a practical problem. In this paper, we present an algorithm to solve the approximate implicitization of a given parametric curve by using a quadratic algebraic spline curve.

由于精确隐式化过程不一定可以实现，即使可以实现隐式曲线曲面的阶数高计算复杂，并且具有不希望的自交点和奇异分支，从而限制了隐式化的运用，所以寻求参数曲线曲面的近似隐式化问题成为很实际又重要的问题，提出利用二次代数样条曲线来实现一般平面参数曲线近似隐式化的一种算法。

His new position was not an easy one, placed as he was in the midst of an upstart metropolis, half Western, half Oriental, in the neighbourhood of a court in which luxury and intrigue always played the most prominent parts, and at the head of the clergy composed of most heterogeneous elements, and even (if not canonically, at least practically) at the head of the whole Byzantine episcopate.

他的新职务是不容易的，放在他的是在复杂多变的一个暴发户大都市，有一半西方，东方的一半，在附近的一家法院，其中奢侈品和阴谋一直扮演着最突出的部分，在总的神职人员组成的最异质元素，甚至（如不canonically ，至少几乎）在头部的整个拜占庭主教。

Firstly, the establishment of model requires sophisticated neurointerventional techniques and costly interventional materials(sacculus, minikin circlip ring, endovascular electrocoagulation), it not only consumed time but also increased the resesrch expense ; Secondly, although the Massoud model is the first successful model that contain the nidus, but it is far from mimicking the high-flow fistulae frequently observed in a brain AVM; Thirdly, the rapid spontaneous thrombosis result in fistula occlusion in a short time;Fouthly, the model's natural course and the long–term patency of fistula are unclear;Currently the model is only used for the short-term research.

但Massoud模型目前存在以下主要缺点：第一，模型的建立需要复杂的神经介入技术和昂贵的介入材料(球囊、微弹簧圈、血管内电凝等)，操作费时，又大大增加了研究费用；第二，Massoud模型虽然首次具备了畸形血管团，但它远不是我们临床上常见的含有高流量动静脉瘘的脑AVM；第三，颈动静脉吻合口自发性血栓形成进而导致引流静脉闭塞的机率很高；第四，Massoud模型的长期自然过程和动静脉吻合口的长期通畅性尚不清楚，目前仅仅作为急性期模型。

Li Rui's narratives of Cultural Revolution adopt neither a moralistic stance nor a posture of"refusing to regret"assumed by some intellectual youth. Rather, he offers a penetrating reflection of Cultural Revolution from the triple levels of mass ignorance and fervor, intellectual unreflectiveness, and the modern characteristics of revolutionary ideology. His narration of the complex observation, interrogation, denial, co-optation, and mythologization between intellectuals and the mass deepens the theme of alienation since May Fourth movement.

李锐的"文革"叙事不是道德化的，也不是知青式的"拒绝忏悔"，而是从民间的愚昧和迷狂、知识分子的非反思性、"文革"意识形态的现代特征三个层面反思"文革"，达到了相当的深度，他对知识分子与民间复杂的观看、质疑、拒绝、收编、神化等关系的叙述，是对五四以来的隔膜主题的深化。

The most ancient traffical light control unit was designed by digital electric circuit. With the development of science and technology,the traffic light which designed by electric circuit can not contain the increseing pressure of the traffical day by day,so we must find a new method to replace the control unit which is complex and worked insteady.

摘要古老的交通灯控制系统大多是由数字电路来实现的，随着社会经济的发展，数字电路交通灯越来越不能满足日益增长的交通压力，因此必须寻求一种新的方法来取代这种复杂而工作不稳定的控制系统。

These issues are mostly difficult to solve according to the general study of mathematical models, but the Monte-carlo method is very convenient for calculating Multiple Integral of low dimension in regular domain of integration or complex range or even non-connected region.

这类问题绝大多数按数学的研究处理模式出发，都是难以解决的，而蒙特卡罗方法对计算高维空间中维数不很高且积分区域是规则的积分、以及复杂区间甚至不连通的区域上的积分都却是很方便的。

As a result, it is necessary to replace the traditional statistic model with nonlinear model that can deal with imperfective information in order to improve the quality of forecasting stock market.

股市的运行是一个非常复杂的不完备的非线性过程，因此，需要用对不完备信息进行处理的非线性模型代替传统的统计模型，以便进一步提高股市预测的质量。

It thrills with its light-footed agility. It impresses with its graceful presence. It performs better than ever before, and it work longer than ever before. Inside, the typical cup bottom has been swept aside, and in its place is an elegance and ergonomic harmony that will forever change the way we drink. Welcome the tea set for the new millennium. Please come in.

分酒装置的最重要的概念就是让使用者体会到倒酒这个过程中充满的乐趣，于是我们提出：要让使用者觉得倒酒的过程和品酒过程一样美妙，让产品看起来不是一个复杂的装饰品，也不是一个简单的图形，或者可能看起来更酷的外观。

Therefore the RMB appreciation is helpful for balancing China international balance of payment step by step, but the reason lead to the China international balance of payment surplus is profundity and complex especially to the cumulation of trade surplus, which is no only lead by undervalued RMB and improper form system of RMB exchange rate.

这说明虽然人民币升值有利于促进我国国际收支逐步趋于平衡，但是我国的国际收支顺差，尤其贸易顺差的累积&冰冻三尺，非一日之寒&，有着深刻、复杂的原因，不单单是由于人民币被低估或者人民币汇率形成机制不合理造成的。

Complicated dislocation caused by soft tissue unbalance is the focus of future research.

未来对于髋关节不稳定治疗的研究将主要围绕如何处理较复杂的各种原因引起的软组织不平衡所致的复杂性脱位展开。

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。