小球

For this, relative velocity of the

为了做这个检测，小球的相对速度可以使用公式2 来计算

The self-centering mechanism design of bipolar endoprosthesis has advocated the use of offset centers of rotation between the inner and outer joint bearing surfaces to generate a self-centering moment on loading to prevent impingement of polyethylene rim and stem neck or cup fixed at wrong place. The design was used popularly, but the function of self-centering mechanism was discussed in very few papers. Three bipolar endoprosthesis were evaluated: UNIQHIP system, UHR system, and AML system.

双极式半人工髋关节的离心复位机构，是利用髋臼外帽的球心与股小球的球心两者在不同点，来防止发生髋臼外帽固定於髋臼中某角度卡住不动，而使股骨柄颈部固定磨损超高分子聚乙烯内衬之一边缘，进而加速超高分子聚乙烯内衬之磨耗，造成骨溶蚀与人工髋关节的松脱。

For next Sunday's experiment you will need the following special items: A piece of cardboard (about 30cm by 16cm), a sheet of construction paper (about 35cm by 50cm), sellotape, a straw, a ball bearing, bb gun bullet or other small ball that will fit inside the straw.

下周日的科学实验，你需要特别准备以下的东西︰一片硬纸板约三十公分长、十六公分宽，一张美工纸，约五十公分长、三十五公分宽，胶带、一根吸管、小铁球、BB枪子弹、或其它可塞入吸管里的小球。

Additional, set on shoe on the spherule of posse shagginess also is very modern dress up oh.

另外，在鞋子上镶上一团毛茸茸的小球也是很时髦的妆扮哟。。。

The heavy weapons are used to launch pellets containing silver iodide into clouds.

这些重型武器是用来将碘化银小球发射到云层中去的。

If the ball falls and slops on the number you bet on.you win.

如果小球停落在你下赌注的号码上，你就赢了。

Riding on the trend of the 400th anniversary of Kepler's telescoping the universe, NSC, combining astronomic, historical, literary and technological materials, presents a special exhibition "400 Years of Heaven Gazing," applying advanced techniques to fly the participants to the beautiful endless universe. Exhibits such as the juxtaposition of Kengting, Lulin and Hawaii etc. four observatories' realtime images and 3D movies such as Galileo's Free Fall experiment at Leaning Tower of Pisa and the Mystery of Saturn etc. altogether enrich the Spectacularity.

配合全球天文年及纪念伽利略运用天文望远镜仰观宇宙四百年，国科会融合天文、历史、文学和科技等元素，举办「2009科学季：仰观苍穹四百年」特展，不但藉由新颖的科技技术，要使民众进入展场，如同置身於浩瀚美丽的宇宙，而且还呈现垦丁、鹿林及夏威夷等四地天文台观测的即时影像画面，以及包括伽利略大小球的比萨斜塔自由落体实验和土星之谜的3D立体电影院等等，都更增添特展的可看性。

Surely, the reduced aperture mitigates the effect of spherical aberration also for a sensor fixed at b, but it is possible to do better.

当然，减小光圈对于放在B点的感光元件来说仍然是有利于减小球差的，但是我们可以做得更好。

The effects of the immobilization conditions, the structure of spherule, the mechanical strength, elasticity, stability, and the activity of the bacterial enzyme were investigated, analyzed and determined the immobilization conditions.

探讨了固定化条件对固定化小球结构、机械强度、弹性、稳定性和培养后菌体的谷氨酰胺合成酶的活性情况的影响，分析确定最佳的固定化条件。

Experiment result showed the intension of immobilized spherule was improved when suitable amounts of polyvinylalcohol and SiO2 were added.

实验结果表明，添加适量聚乙烯醇和硅藻土后，固定化小球强度提高。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐