圆周

Based on the reasonable simplification and assumption for slewing ring in mechanical engineering, calculating the pressure on unit length of arc at any angle of raceway under different loads of slewing ring .

在对工程机械中常用的回转支承装置进行合理的简化和假设后，根据其受力状况，分别计算出作用在回转支承上的各种载荷对滚道圆周上任意角处单位弧长上所产生的压力，最后应用压力叠加的方法，推导出回转支承装置摩擦阻力矩的计算公式。

What do you call a line from the center of a circle to its circumference?

从圆心到圆周的那条直线段叫什么？

Any line drawn through the center of a circle is noraml to the circumference.

通过圆心画的任何直线均垂直于圆周线。

A line segment that joins the center of a circle with any point on its circumference.

圆半径：将圆心与圆周上任一连接起来的线段

The results show that, when the computational error and its accumulation are eliminated effectively, the laminar flow in OFR with perfect-symmetric boundaries behaves in a pattern of central symmetry and circumferential uniformity while the turbulent flow field presents a centrally symmetric and circumferentially non-uniform structure with 8 transverse vortices arrayed circumferentially in a way of central symmetry, similar to Taylor vortices in Couette flow.

模拟结果表明在有效消除计算随机误差以及误差积累的情况下，几何边界理想对称OFR内的三维层流流场呈现出良好的中心对称性和周向均匀性，而湍流流场中心对称的同时呈现出周向非均匀结构－在圆周上生成8个中心对称排列的横向漩涡，其形态与Couette流中的泰勒涡类似。

Is the centre of a circle of radius 1 and X, Y are points on the circumference.

是某个半径为1 的圆形的圆心，X、Y 为圆周上的两点。

The text underneath the circles must say the name of the certifier. The form and proportions of the JAS seal may not be altered.

在圆周下面的文本必须有认证者的名字，形状和 JAS 印章的比例不能被改变。。

The text used a circular motion model with charged particle to explain the photoelectric effect.

文中还用以电荷群的作用力为向心力做圆周运动的带电粒子模型解释了光电效应。

The best thing would be a handle that for groundstrokes had a large circumference at the forefinger, and for serves, a small circumference at the forefinger when you choke down: i.e. a coke-bottle-shaped grip, or rounding off the bevels about 4 cm up the handle to give a tapering smaller circumference at that spot.

最好是有一款手柄在击落地球时食指处有大的周长，而在发球时，你往下握一点，食指处有小的周长：就像可口可乐瓶身那种形状的拍柄，或是在拍柄上4厘米处把斜面削圆，在那形成一个更小圆周的锥形。

Some methods of addressing the critical problem of circle movement in mechanics are presented with examples.

结合具体实例，简述了如何求解圆周运动中的临界问题的方法。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。