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Their mesogenic temperature ranges cover from 78 to 110 degrees. The milting points of compound 19a and 19b are 43.9 ℃ and 74.8 ℃ respectively while their clearing temperatures are 92 ℃ and 112 ℃. Their mesogenic temperature ranges cover from 36 to 57 degrees. They are suitable for formulating eutectic mixture and for the applications in PDLC, reflective liquid crystal display, and IR modulator.

第三系列同样以2，3-邻二氟苯二炔基二苯基为主体，但相对碳链长度和前一系列相反，将邻二氟苯二炔基端的碳数固定为6，二苯基端碳数分别为2与3，合成出向列型液晶化合物19a与19b，观察到熔点与澄清点温度均较前一系列化合物低，熔点温度下降约20~30oC，澄清点温度下降约50~70 oC，液晶相温度范围约36~57 oC之间，期望能应用在PDLC，反射式液晶显示器，及红外光调节器上。

The main aim of this thesis is to study the performance of a vortex tube in room and low temperature ranges and to find out the mechanism of the energy separation of the vortex tube, as well as to obtain from the applications of a vortex tube in low temperature ranges.

本文的研究目的就是通过理论和实验两方面深入分析和研究涡流管的常温和低温特性，探求涡流管能量分离机理的内在规律，以便为涡流管在低温下的应用提供依据。

In chapter 3, the characteristics of relative motion of small satellite based on ground station are firstly analyzed, in which using spherical trigometry, the analytic formulas evaluating the longitude ranges of ascending node which can cover the target are deduced with J2 precession. With the solution, the longitude ranges of ascending node limited by the cross-time can be gained. Secondly, a serious of characteristics of small satellite to space station is studied.

在第3章，首先分析了卫星相对地基的运动特性，在地基的运动特性研究中，重点研究了以升交点地理经度来描述所有能覆盖到目标点的轨道，利用球面三角形方法推导了在考虑地球形状J2项摄动影响时，各种情况下能覆盖目标点的轨道升交点经度范围，得到了完整的解析表达式。

The temperature in Kunming usually ranges between 15C and 25C,.

昆明的气温通常在15 到25氏度之间

The temperature in Kunming usually ranges between 15C and 25C

昆明的气温通常在15 到25摄氏度之间

Is separated from the rest of the country by mountain ranges from north to south including the Rockies; the central part is a vast plain.

地形十分复杂：东部山区沿海省份沿劳伦斯湾和大西洋形成不规则的海岸；西部，太平洋沿岸地区被南北走向的山脉分离，其中包括落基山脉；中部是一个大平原；3。

Lawrence and the Atlantic;The west part, the Pacific border is separated from the rest of the country by mountain ranges from north to south including the Rockies; the central part is a vast plain.

地形十分复杂：东部山区沿海省份沿劳伦斯湾和大西洋形成不规矩的海岸；西部，太平洋沿岸地区被南北走向的山脉分辨，其中包含落基山脉；中部是一个大平原；3。

I want to make a detour of those lofty arid mountain ranges where one dies of thirst and cold, that "extratemporal" history, that absolute of time and space where there exists neither man, beast, nor vegetation, where one goes crazy with loneliness, with language that is mere words, where everything is unhooked, ungeared, out of joint with the times.

我想要一个河流能把人载到各地去的世界，不是成为古老传说的河流，而是能叫人同别的男女，同建筑、宗教、植物、动物接触的河流。

In addition, the curve of terahertz absorption coefficients can be fitted by a straight line with a slope of 1.92. From the results of scanning electron microscope, the ranges of inner diameter and outer diameters of the sample were from 5 to 15 nm and from 15 to 25 nm, respectively, and its length was in the order of micrometer.

检测结果显示，在0.2～2.0 THz内，样品折射率随着频率的增加而减小，吸收系数却随着频率的增加而增加，并可以拟合斜率为1.92的直线；样品的内径为5～15 nm、外径为15～25 nm，且长度达到了微米级，样品含C量大约为94%，其他为O和Cl杂质元素。

The increasing ranges between bacteria and actinomyces were almost equivalent, namely 36.4% and 36.3% respectively.

施用酵素菌肥后，土壤中细菌和放线菌的数量较对照组都有所增加，二者增幅几乎相当，分别为36.4%和36.3%。

For every one of my New Year resolutions, I have been a backslider for years.

说到我的新年决心，我每年都做

With empathy and focus on a feeling level, we can all relate to the common ground of mutuality of emotions.

有了同情心和感觉上一级的重点，我们都可以涉及到相互的情感共同点。