球地

If you're a sloucher, trade in your chair for an exercise ball, which forces you to sit taller, says Andrew Weil, M.D., author of Healthy Aging (Knopf,$28, www.amazon.com).

医学博士、《健康变老》一书的作者Andrew Weil说如果你是低头垂肩者，把椅子换成一只锻炼球，它能迫使你坐地更高。

Just smash the ball to break into their hiding places and steal them back!

刚刚粉碎球破门进入他们的藏身地，并窃取他们回来了！

Nobody in the sold-out ballpark believed it wasn't going over the wall because it was crushed.

D 在这个爆满的球场中，没有人认为这球不会飞出全垒打墙外，因为它是这麼狠狠地被击中。

The formulation for the contact force between two spheres and the stress and displacement which is caused because of the contact force is also derived. The calculation method of the contact of sphere and plane, sphere and tee is given .At the same time, the formulation for the force distribution of the contact surface is established on the discussion of two arbitary elastomer's contact.

第二章以《弹性力学》理论为基础，详细地介绍了接触单元理论，导出了两个球体之间的接触压力及由此引起的应力和变形，给出了球体与平面相接触、球体与球座相接触的计算方法，同时，对于两任意弹性体接触的讨论，得到了接触面上压力分布的公式。

A very small lens aperture is employed to correct spherical aberration, but this sevrely limits the final resolution.

可以用一个非常小的透镜孔阑来校正球差，但这会严重地影响最终鉴别率。

Properties of angle deformation have been deeply studied,the stress calculation formula that calculating angle deformation of spherical shell is derived.

在深入地研究了球形壳体角变形的性态基础上，推出了球形壳体角变形附加应力简易计算式；给出了角变形区变形特点，和球壳结构与角变形限量间的数值关系，经实践证明可同JB1127－82规定对应使用。

Key words: geomagnetic field model calculation; Taylor polynomial model; spherical cap harmonic model

本文所建立的中国区域地磁场球冠谐模型与泰勒多项式模型具有良好的一致性。

Taking IGRF2000 as the main normal field in the region, the spherical cap harmonic modelsof the anomaly geomagnetic field in the region are established.

将国际参考地磁场（IGRF2000）作为地磁正常场，建立了京津冀地区地磁异常场的球冠谐模型。

It can be shown that the base function for the optimal analysis of PSV data is HSV eigen-function deduced from the proper or thogonal decomposition of the geomagnetic model data instead of the lower degree spherical harmonic function in common use.

统计学意义上最优的分析方法不是直接对PSV数据作低阶轴对称球谐分析，而是通过对地磁场模型数据的特征正交分析，得到表征HSV的特征函数，再用它们去分析PSV形式的数据。

As asteroids are relatively round, it is easy and fast to modify the geometry with spherical displacement maps.

小行星大都比较近似于球型，因而就可以简单而又快速地用球面位移贴图来修正它的几何结构。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。