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New contributions of this work are as follows:(1). Preparation of Spherical MgCl_2-Supported Late-Transition Metal Catalysts for Ethylene Polymerization Facile and effective immobilization of late-transition metal catalysts. 2,3-bis-(2,6-diisopropylphenyl) butane diimine nickel dibromide (1) and 2,6-bis-[1-(2,4,6-trimethylphenylimino)ethyl]pyridine iron dichloride (2), for ethylene polymerization has been achieved, using spherical MgCl_2 supports obtained by thermal dealcoholization of MgCl_2·2.56C_2H_5OH, and the effects of dealcoholization temperature on supported late-transition metal catalysts and the properties of resultant polymers were studied, the results indicated that: 1.Supports with appropriate mechanical strength, high surface area and high porosity could be prepared by thermal dealcoholization of spherical MgCl_2·2.56C_2H_5OH supports; 2.BET, XRD, IR, SEM, GPC and DSC analyses indicate that the activities of the supported late-transition metal catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature.

本工作的新贡献如下：(1)、球形氯化镁负载后过渡金属催化荆催化乙烯聚合本文将配合物2，3-双(2，6-二异丙基苯亚胺)丁烷二溴化镍(1)和配合物2，6-二[1-(2，4，6-三甲基苯亚胺)乙基]吡啶二氯化铁(2)分别直接负载于经不同热脱醇温度处理的球形氯化镁载体上，研究了氯化镁载体的脱醇温度对负载化后过渡金属催化剂及其聚合物的影响，研究表明： 1、通过对球形MgCl_2·2.56C_2H_5OH载体进行热脱醇处理，可以获得合适机械强度、较高比表面积和较高孔隙度的球形氯化镁载体； 2、BET，XRD，IR，SEM，GPC和DSC研究表明，脱醇温度极大地影响负载后过渡金属催化剂的活性和聚合物的性能。

The descriptions of appropriate usage are based on the dicta of recognized authorities; on my own experience as reader, writer, teacher...; and occasionally simply on my own preferences and prejudices.

这样的三个稍稍分开的句号有时也表示说话停顿或迟疑。例如

To sum up, we first conclude that we can isolate mesenchymal stem cells from human fetal articular cartilage and they can be induced to differentiae into several cells under appropriate induction conditions. Anymore, they have their original tissue speciality. Therefore, we first report that mesenchymal stem cells of articular cartilage origin are superior to mesenchymal stem cells of bone marrow origin as seeding cells of cartilage tissue engineering and we provide a kind of new seeding cells of cartilage tissue engineering for the future clinic application.

综上所述，我们首次报道不仅可从人胚胎的关节软骨中获得间充质干细胞，而且软骨来源的间充质干细胞除具有骨髓来源的间充质干细胞的多向分化能力外，还具有其来源的软骨组织特异性，那么，其作为软骨组织工程的种子细胞要优于骨髓来源的间充质干细胞，从而首次提出了一种新型的软骨组织工程的种子细胞，对于未来的软骨组织工程的临床应用提供理论依据。

During the calculation the results got by quintic spline kernel was the best so it was chosen as the proper kernel for the SPH simulation. By comparison of the simulation results got by SPH and finite volume method, it was proved that the buffer cells method proposed in the SPH simulation to implement the Dirichlet boundary conditions was accurate, and this is of great importance for the simulation of flows pass a pipe. At last, the SPH method was improved to simulate the liquid-solid two phase flows and the results show that this method was appropriate for the simulation of flows containing viscous fluid and macroscopic solid components. Now the two methods are both able to predict the continuum flows and rarefied flows severally, but the hybrid program still has some aspects to be improved.

首先用标准算例验证了SPH方法的理论模型和计算程序的准确性；通过比较确定选用五次样条核作为计算低雷诺数下的粘性连续流动时的核函数；采用SPH方法和有限体积法分别对同一管道流动进行了对比计算，证明了本文提出的边界缓冲区方法在实现SPH方法中的流体边界条件时的有效性，解决了SPH方法模拟管道流动时的一个关键问题；巧妙地使用SPH方法对化工分离流动中常见的固液两相流及固液耦合作用进行了模拟尝试，获得了较好的结果；在跨尺度计算方面，目前两个子程序已经能够分别模拟连续的和稀薄的二维管流问题，二者的耦合计算程序还处于调试和优化阶段，各个参数对于计算精度和计算速度的影响规律仍在探索中。

In all cases the record of action establishing a new subcommittee or working group shall include a mission directive and such instructions on composition, duration and disestablishment as the organising body shall deem appropriate.

在所有情况下，建立一个新的次级委员会或工作小组的行动纪录，应包括一项使命﹙ mission directive ﹚指令和这样组成的指示、期限和筹办机构认为适当的解散。

It is worth noting that do not mean the hard disk space and zoning Bad Track contains too tight around Bad Track should have the appropriate "good" and space as a buffer.

值得注意的是，不要为吝啬硬盘空间而把含有坏道的区划得过分紧凑，坏道周围应留有适当的"好道"空间作为缓冲。

The efficiency of the punishment after the dissidence registration should be divided into two sorts as validity and invalidity according to the dissidence registration whether is appropriate or not.

异议登记后处分行为的效力，应以异议登记是否正当分为有效与无效两种。

As "The Song of Everlasting Sorrow" moves toward its violent, melodramatic and distressingly appropriate ending, readers may feel a Proustian nostalgia for the novel's lost time, a sadness that mirrors the melancholy that haunts Wang Qiyao and pervades the fascinating, mostly vanished longtang of Shanghai.

长恨歌》的结局暴力、传奇也令人哀伤，读者们也许会沉浸在小说里，像普鲁斯特般哀伤地缅怀流逝的岁月，同样使人感到哀伤的，是王琦瑶的命运，还有，上海那些迷人，但是消失殆尽的弄堂。

The primary and secondary uses of land, such as forest, agricultural, cultivated, pasture and residential land, etc., which describes the dominant character of a geographic area and thereby establishes the types of activities which are most appropriate and compatible with the potential or designated use of the land

土地的直接与间接用途，例如作为林业，农业，栽培，草场，居民用地等，反映了一个地理区域的主要特征，并因此确定了最适合于潜在或者规定的土地用途的活动类型。

Therefore, it is appropriate for product innovative and customer intimate organizations to achieve "just enough process improvement, and perhaps to do even that by stealth as a way to take clear aim on the dominant strategy of the organization.

因此，这样对于产品创新和客户亲密组织以达到"足够"过程改进是比较适合的，可能只是悄悄地进行，作为一种手段对于组织的主导战略采取明确的目标。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！