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This paper deals with the aberrations of optical systems consisting of cylindrical components with their axes, parallal and having a common axis of symmetry.

本文首先由柱面系统中描写光线所须的参数和对称性，确定了同轴柱面系统的独立象差数是八个，而对无限远物体而言则只有六个。

It comes form vibration signal that obtained by monitoring in two mutual vertical direction on one cross section of the axletree or axes neck.

它可以通过振动位移和激振力的相位的变化来判断转子的临界转速；当挠性转子由不平衡力引起振动时，在不同的转速下有不同的振型，根据不同的振型对转子进行有针对性的平衡；另外根据检测到的轴心轨迹图形状，可以分析出造成振动的具体原因，根据不同的原因进行防振和减振。

The program developed with the formula enable the coordinates for points and the parametric formula for curves in the orthographic projection to be transferred into ones in the axonometric projection, which can be directly displayed on the screen. In addition, except for assigned different values to elastic coefficient of the axial direction and the angles of the axes, it is generally adapted in drawing any of the axonometric projections.

用它编程，可以把正投影中点的坐标或曲线的参数方程，转换成屏幕上能够直接显示点的轴测投影的坐标或曲线的轴测投影的参数方程，而且除了赋轴向伸缩系数和轴间角的大小、正负不同的参数值外，对绘任一种轴测投影和相应正投影都具有通用性。

When the axonometry projection plane is parallel to a coordinate axis, and the coefficient of axial deformation of two axes that parallel to the coordinate plane are equal, the cabinet axonometry is produced.

轴测投影面平行于一个坐标轴，且平行于坐标平面的那两个轴的轴向伸缩系数相等的斜轴测投影称为斜二等轴测图。

If the "Init" button is pressed during the powering of MJoy16 the calibration data is reset to defaults and all axes will be recalibrated as from a fresh start.

如果在启动MJoy16的时候按下了"初始化"按钮的话所有的校准数据将会被重置为初始化的值所有的轴也将被重新校准。

How much more elegant is it to slay your foe, with the roses of irony than to massacre him with the axes of sarcasm or to belabor him with the bludgeon of invective

用讥讽的玫瑰镇服你的对手，较之用嘲弄的板斧将他剁砍或用谩骂的大头棒将他捶打，更为温文尔雅。

How much more elegant is it to slay your foe, with the roses of irony than to massacre him with the axes of sarcasm or to belabour him with the bludgeon of invective.

用讥讽的玫瑰镇服你的对手，较之用嘲弄的板斧将他剁砍或用谩骂的大头棒将他捶打，更为温文尔雅。

Beryl is a hexagonal crystal, and as such has four axes of symmetry.

绿玉石是六角形的水晶，而且同样地有对称的四个轴。

Methods morphology ,opening,closing and hemodynamicon short axes section of large arteries and on long axessection of aorta were observed.results thickening,calcification ,hemodynamic,morphologic changes of the aortic wall were exacerated with increased age of patients.conclusion cdfi is of great valve in diagnosing bicuspid aortic valve.

重点通过大动脉短轴及主动脉长轴等切面观察二叶式主动脉瓣的形态、回声、启闭及血流动力学情况。结果：随着年龄的增长，瓣膜增厚、钙化、血液动力学、心脏形态学改变逐渐加重。结论：彩超对先天性二叶式主动脉瓣畸形及病变的诊断具有重要意义。

However, the exchange bias field is influenced by the magnitude andthe direction of the stress, the magnitude of biquadratic coupling field, and the angleof the ferromagnetic and antiferromagnetic easy axes.

结果表明交换偏置场依赖于外磁场的方向，而与其大小无关；此外应力场的大小和方向，双二次耦合场的大小以及铁磁和反铁磁易轴间夹角均对系统的交换偏置场有影响。

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。