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The designed method of optical imaging system and optical scanner have been described. This optical system consists of two aspherical mirrors i.e. Cassegrain system, the designed datas have been given.

描述了光学成像系统和光学扫描系统的设计方法，光学系统是由两个非球面反射镜所组成，并给出了光学系统设计的各种数据。

In 1937, he embarked on a three-day climb up Piz Badile, which had never been scaled. Cassin and his team ascended safely and also rescued two climbers who had been stranded in the middle of a blizzard for 12 hours.

1937年，他展开三天攀登从来没人爬过的巴戴尔峰壮举，卡森及其团队安全攻顶，还救回两名因暴风雪被困山中达12小时的登山客。

One of the reasons the US has been so strong is because we have always been cathartic and have purged ourselves.

美国之所以一直这么强大的原因之一，是我们总是在破旧迎新。

His fears had been ever since growing upon him. He had been trying to fancy them causeless, but could not.

他一直试图使自己相信没有理由感到恐惧，可他未能做到。

By means of the celestial globe which has been corrected in annual differential, for Zheng He's Star Drawing Pictures have been restored, on the basis of which each star in the Star Drawing Pictures corresponds to is contemporary name.

借助于经过岁差修正的星球仪复原了四幅郑和牵星图，并在此基础上考证出牵星图中每颗星所对应的现代星名。

After having been practiced for several dozens years CEM has been important management thought and theory.

经过几十年的实践，客户资产管理已经成为了一种重要的管理理念和理论。

It has also been studied that the influence of the cementite formation in catalyst Pt-Fe/C,as it is heated. In the end,the adsorptive oxygen on catalyst surface has been evaluated.

本文对铂铁合金催化剂中形成渗碳体的情况亦做了初步研究，分析了渗碳体的形成对催化剂性质的影响。

As part of the New England Centenarian Study, Thomas Perls and his colleagues at Boston University found that women who had been pregnant at or after the age of 40 were four times more likely to survive to 100 than women who had been pregnant earlier in life.

美国波士顿大学的帕尔斯及同事主持的「新英格兰百岁人瑞研究」发现，40岁或40岁以后才怀孕的妇女，要比年轻时怀孕的女性，更有可能活到100岁。

By taking advantage of a corollary of the Desargues theorem and the corresponging extension of Desarguesian configuration, the concept of stereohomology has been defined in projective geometry and presented based on homogeneous coordinates. Consequently, a series of geometrical transformations, such as central projection, parallel projection, centrosymmetry, translation transformation, reflection, rotation transformation, which can be contained in it or derived from it have also been analytically defined.

利用Desargues定理的一个推论和引申的Desargues图形，给出"空间透射"在射影几何意义下基于齐次坐标表象的解析定义，从而解析定义了可蕴涵其中的中心投影、平行投影、中心对称、平移、反射等几何变换以及可由此衍生出的旋转变换。

In this paper,the influences of the location of mass centre on the moving stability of a motorcycle has been studied by way of establishing a mechanical model,and further,a general principle has been proposed to locate the mass centre in design of motorcycle s.

本文通过建立摩托车动态力学模型，分析了质心位置对车辆稳定性的影响，提出了质心位置设计的一般原则。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。