中心球

According to the requirement of precision diameter measurement of the single crystal silicon sphere, the principle and characteristics of the measuring system were presented, and mathematical models were established for calculating the ellipticity of concentric interference rings with different beam incident angles.

针对标准单晶硅球直径精密测量的需要，本文在介绍标准硅球直径测量系统原理并分析其光路特点的基础上，根据建立的数学模型，对激光束斜入射标准板时产生的椭圆干涉图像进行了分析，并对不同入射角度时干涉环中心点带来的直径测量误差进行了研究。

"Monthly drug administration to all dogs" is an effective way to the control of echinococcosis in dogs and of hydatid disease in sheep.

以家犬驱虫为中心的策略，即"犬犬驱虫，月月投药"的措施对控制家犬的棘球绦虫病和绵羊的棘球蚴病是有效可行的。

The World Health Organization, which has reduced or eliminated the incidence of a number of diseases worldwide, including smallpox and polio, has an annual budget of$421 million– about what it cost to build the new American Airlines Center, a basketball/ hockey facility in Dallas, Texas.

世界卫生组织在全世界减少或消灭了若干疾病的发病率，包括天花和小儿麻痹症，而该组织每年的预算为4.21亿美元，约为在得克萨斯州的达拉斯建造一座新的美航中心、球/棍球设施所需的费用。

A lateral pass from the back receiving the snap from the center to another back behind the line of scrimmage.

横传一记横传，在对阵争球线后由一个接到从中间向后传的球的后卫自中心向另一后卫传出

The broken line of the facade is continued into the central rooms of the house, where like the ball in a pinball machine it shoots around to draw dynamic balconies inside its square volume.

立面上的折断线一直蜿蜒盘旋到住宅中心，就好象弹球游戏桌里被发射的弹球来回反射的运动轨迹，为方正的体量勾划出富有动感的多样露台来。

Applying a power of 0.5 to the input2 value of the Multiply Divide node calculates the square root of that input1 value, completing the calculation necessary to find the linear distance of any point within the sphere from the center of the sphere.

在Multiply Divide节点里赋予INPUT2数值一个幂值0.5去计算INPUT1值去平方根，完成的计算结果将得到在球上的任何点从球心到该点的线性距离。在图像上右侧上的在球上距离中心的边界点是通过执行下面计算过程来决定值的，它是1

British researchers report that music can activate the sacculus, a tiny structure deep within the middle ear that's connected to a pleasure center in the brain.

英国研究人员报告说，音乐可以让球囊兴奋，球囊是中耳深处的微小组织，与脑部的管理愉悦的中心相连。

When he rubbed it, a small spark flickered into being at the center, gradually brightening until it limned the encircling casks and bundles with soft honey-colored light.

他抚摸着水晶球，在这球的中心闪出一个小小的火花，逐渐扩散，直到它柔和的蜜色的光，照亮了周围的袋子、包裹。

Decide lever with the ball, him that is to say enters the arena before drive, be in from, between his ball, locate a fictitious center quickly join is linear.

以球定杆，就是说自己进场击球前，在自、他球之间，迅速找出一条虚拟的中心连接直线。

The cut-off valve with pilot valve without hand wheel, stem and lift nut inside will guide block and guide slot Butterfly Valves to guide sleeve, the disc-shaped disc to disc type bowl shape, and holes in the bottom of the flap valve to open, the valve cover of the original valve stem hole to hole diversion, because of increased pressure ring, ring, and the valve flap to class mortar, so that the flow passage separated the upper chamber cavity, external cavity, cavity, in the cavity and The external cavity increases with draft tube and stainless steel manual ball valve, flap valve in the cover plate and the center of the end of installing the spring, the upper flap valve install compression seal of the pressure ring, outside the cavity of the wall to open a Drainage holes.

带先导球阀的截止阀无手轮、阀杆和内升降螺母，将导向块与导向槽改为导向套，将盘形阀瓣改为类钵体形阀瓣，并在底部开阀瓣孔，电动蝶阀将阀盖原阀杆孔改为导流孔，因增加压环、密封圈和将阀瓣改为类钵体，使上通流腔分隔为上腔、外腔、内腔，在上腔与外腔的外部加设有导流管与不锈钢手动球阀，在盖板与阀瓣底的中心部加设弹簧，阀瓣上部加设压紧密封圈的压环，在外腔的壁上开有放水孔。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。