圆的直径

A C and BD intersect at X and Y .

为直径的圆相交於X 和Y。

The centre of this wooden disc was hollowed out to a diameter equal to the exterior diameter of the Columbiad.

这木盘中间留着一个直径相当于哥伦比亚炮外径的圆洞。

The reaction system to produce hydroxyl radical was also optimized such as the effects of reactant concent...

以直径为300μm的碳圆盘电极为检测电极，工作电极电位为0.95Vvs。

In Figure 3, A and B are two cones inside a cylindrical tube with length of 20

在图三，圆管的长为 20 及直径为 6 ，内有个圆锥体 A 和 B。

The axially symmetric torsion of rigid circular shaft of varying diameter embedded in an elastic half space is studied by line-loaded integral equation method, where the problem is formulated by distributions of fictitions fundamental loads PRCHS (point ring couple in half space) along the axis of symmetry in interval of the shaft and is reduced to a one-dimensional and non-singular Fredholm integral equation of the first kind and is easily solved numerically.

弹性半空间；本文用线载荷积分方程法研究嵌在弹性半空间的刚性变直径圆轴的轴对称扭转。利用将"半空间的点环力偶"这一虚的基本载荷沿对称轴的圆轴区间中分布就能使本问题归结为一个一维的非奇异的Ferdholm第一种积分方程，且很易用数值求解。文中给出刚性圆锥，圆柱，圆锥柱嵌在弹性半空间的扭转的数值计算的例并和他人的已知结果相比较。

Some physicochemical and biological properties of Muscovy duck parvovirus Q-strain were studied by conventional virological methods.

用常规病毒学鉴定方法对番鸭细小病毒株的部分理化特性和生物学特性进行了研究，结果表明MDPV颗粒呈圆球形，直径大小为22-2。。。

In the product of 71.5mm of diameter of bearing pitch circle, rotate speed coming back is spent achieved 21000rpm,"For the whole world highest ".

在轴承节圆直径71.5mm的产品中，旋转速度达到了21000rpm，"为全球最高"。

NTN development went Dmn to be worth diameter of 〔 bearing pitch circle × rotate speed coming back is spent 〕 is 1.5 million, but the thrust needle bearing that high speed runs.

NTN开发出了dmn值〔轴承节圆直径×旋转速度〕为150万、可高速运转的推力滚针轴承。

The largest known raindrops are slightly less than a quarter-inch across or would be if they were perfertly round.

已知最大的雨点，直径略小于四分之一英寸，如果非常圆的话，就会达到四分之一英寸。

A mathematical mode for circle parameters evaluation is e stablished, the corresponding software is designed and has been applied to the m easurement software of universal tools microscope successfully. A practical case for measuring a ring gauge's diameter and roundness error by the image method is given.

建立了圆参数评定的数学模型，设计了相应的误差评定软件，成功地应用到了微机型万能工具显微镜的测量软件上，并给出一个影像法测量光滑环规直径和圆度误差的实例，将改进置换算法的评定结果与其它评定方法进行了比较。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。