中轴

Birefringence, or double refraction, is the decomposition of a ray of light into two rays (the ordinary ray and the extraordinary ray) when it passes through certain types of ma ...

光在晶体中传播时，再不平行于光轴方向上，由于e光和o光传播速度不同，而出现两个不同折射率的光的像，这种现象叫做双折射现象。

The sphere is mounted by its poles (corresponding to the celestial poles) on a metal axis, and can rotate around it. It takes a night to finish a circuit. The globe is placed in a standing hoop, which is beset into a horizontally placed hoop, supported by four pillars decorated with dragonhead patterns.

我国东汉天文学家张衡，曾经在天体仪上安装了一套传动装置，利用相当稳定的漏刻的水推动铜球，均匀地绕金属轴转动，每24小时转一圈，这一业绩已载入我国光辉成就的史料库中。

In the existing buckling analysis of drill stem in horizontal condition,the drill stem is thought of as an even rod with equal diameter and sticked on the below wall of well on the action of deadweight,so it was simplified as simply supported beam compressed axially and supported evenly along its length by well wall.

在现有的水平状态下钻柱屈曲研究中，一般把钻柱看作均匀的等直径杆，认为钻柱在其自重的作用下，紧贴下井壁，因而通常把水平状态下的钻柱简化为在整个长度上受到井壁均匀支承的轴向受压的简支梁。

There is difficult of joining coupling box of driving system of section mill ,so a mill jigger equipment was developed by Jiaozuo Iron and Steel Co which has simple structure,and can shorten the shafts changing time from 6 hours to 4 hour

由于型材轧机主传动系统中轧机与齿轮箱、轧机与轧机间梅花接轴联接困难，焦作钢铁公司研制出一种轧机盘车装置，该装置结构简单，可使更换工装时间从 6h缩短为 4

The changing rule of strength and ductility was studied.

在钢骨混凝土柱的强度计算中，提出了一种合理的轴力分配方法。

Therefore, CD40/CD40L dyad plays a critical role in the pathology of many immunity-associated diseases such as autoimmune diseases, tumor, and hepatitis.

多种动物模型的建立为探究疾病病因、研究CIMOL／CIMO轴在疾病发生过程中的作用提供了重要的平台。

According to the echocardiography,enlarged internal diameter of left ventricle was found in 8 patients and short-axis fractional shortening of left ventricle 5% in 3 patients.Six out of the above 8 patients presented with shortening of accerlerating time,decreasing of accerlerating time/right ventricular ejective time value and moving forward of spectral peak in different degrees.All patients were given antianginal drugs such as β-recepter blockers,nitrate preparations and part by angiotensin converting enzyme inhibitor,diuretics and digoxin,The illncss of 29 patients were gradually controlled within one week.Three patients with AD were complicated by acute left heart failure.No obvious changes in FS of left ventricle were found on echocardiography by bed.

测量肺动脉瓣口血流频谱，左心室内径增大的8例中有6例出现不同程度的血流加速时间缩短，血流加速时间/右心室射血时间比值减小，频谱峰值前移。31例均给予β受体阻滞剂、硝酸酯类等抗心绞痛治疗，部分给予血管紧张素转换酶抑制剂、利尿剂和地高辛，其中29例在1周内卧位型心绞痛逐步得到控制。3例卧位型心绞痛发作时合并急性左心衰竭者，在床旁观察超声心动图，发现左心室短轴缩短率无显著变化，给予利尿剂、减轻前后负荷等治疗，急性左心衰竭得以纠正。

A decrease in the effects of electrical switching on torsional oscillation s of shafts during fast valving is advantageous to fast valving.

在快关过程中减小电气切换操作对轴系扭振的影响，是保证快关汽门顺利进行的积极措施。

A electrocardiograph and body are connected into a test circuit and is analyzed by the basis of electricity and mathematics.

将心电图机与人体连接成测试系统，通过电学与数学基本原理的分析，结果心电六轴系统中额面与横面的"0"是以右上肢为参考"0"电位点。

The lineshape of the spectrum is determined by the function sinc and the spantaneous emission is elliptically polarized only when γ is very large or observed on axis.

数值分析表明：在平面摆动器中附加适当的轴向磁场，可以提高各次谐波辐射的强度，对于基波和较低次谐波，提高更明显。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。