保持力

One of two magnetic rings is fixed and the other can move axially.Because of the function of magnetic field,two magnetic rings keep each other with a due distance axially.

在磁场作用下，两环自动保持一定的轴向间隙，任何外力作用下此间隙的改变会产生一个恢复力，即弹力。

While Tang Contemporary Art will still be continuing to initiate and push contemporary Chinese artist, to help further knowledge and appreciation of the new dynamism in Chinese art, we are also heading towards a broader ambitions to pursue an expansive interest in the rapidly developing world of Asian contemporary art, with an envision that the potential and vibrancy of artistic boundaries know no bounds and borders.

作为当代中国的文化艺术中心，北京一直吸引着全世界的目光，这也为当代唐人艺术中心提供了一个非常好的艺术经营环境和舞台，"唐人当代艺术中心"将继续发现并推动中国当代新锐艺术家的艺术创作，同时也继续保持和发展与张晓刚，方力均，岳敏君，王广义，刘小东等成名艺术家的合作。

" The first law, also called the law of inertia , states that if a Body is at rest or moving at constant speed in a straight line, it will continue to do so unless it is acted upon by a force."

第一定律说，如果物体处在静止状态或者沿直线做等速运动，那它将继续保持这种状态，除非受到力的作用才会改变。

The result showed that the fermentation ability and survival ratio of BY-03 and FY-03 remained at about 40% and 60%, which was obviously higher than commercial yeast after freezing and kept up at -20℃ for 4 weeks. BY-03 and FY-03's maltase ability were respectively 10. 12 and 15.10u/g, which were higher than commercial yeast, and BY-03 and FY-03's sugar tolerance were also better than commercial yeast under 0%-4% sugar.

实验结果表明，-20℃下冷冻4周后BY-03和FY-03的发酵力保持在40%以上，存活率在60%以上，明显高于市售普通酵母；其麦芽糖酶活力分别为10.12和15.10u/g，高于普通低糖酵母和普通高糖酵母；且在蔗糖质量分数为0%~40%的条件下生长良好。

FOR thousands of years, people have sought substances that they hoped would boost their mental powers and their stamina.

几千年来，人们一直在寻找一些希望能够提高人类精神机能并保持其持久力的物质。

It's a mind-set to play the right way and do the right things for 48 minutes.

我们要在48分钟的比赛中时刻保持集中力，合理的打好每一次的进攻。

The results of numerical experiments, using the four-dimensional variational data assimilation system of the nonhydrostatic mesoscale model MM5, show that: the tangent linear model and adjoint model conducted by keeping the "on-off" switches the same as the basic state, can provide a good approximation of the first-order information to the NLM perturbation and a good descent direction for the minimization procedure; switching on and off at every other time step in the Kuo cumulus parameterization scheme don"t impact the convergence rate of cost function; the existence of the switches don"t impact improvement to the MM5 model rainfall prediction because that not only specific humidity ,but also wind, temperature and pressure are assimilated into the model.

非静力中尺度数值模式MM5的四维变分资料同化系统进行的数值试验结果表明："开关"变量保持与基态一致，所构造的切向线性模式能够提供关于非线性模式扰动的一阶近似，伴随模式所计算的梯度值能够为最小化过程提供较好的下降方向；郭氏降水参数化方案中对流每隔一个积分步的交替发生并不影响目标函数最小化的收敛速度；"开关"变量的存在也不影响将风、温度、气压和比湿结合起来同化对MM5降水预报准确性的提高。

Taking advantage of polynomials of second degree used in Hill yield criterion, and assuming that the yielding of orthotropy is not influenced by orthotropic hydrostatic pressures, a concise and practical yield criterion is put forward for orthotropy.

保持Hill准则二次函数描述的优越性，并假定具有正交特性的静水压力对正交各向异性材料的屈服不产生影响，提出了一种简洁实用的正交各向异性屈服准则。

The test results show that the soil stress distribution under the pile cap is a parabolic curve, and the soil stress ratio varies from 14.6% to 18.1%.

试验结果表明，各幢楼的基底反力大致呈中间小、边缘大的抛物线分布形式；本工程3幢楼承台底土承担荷载的比例最终保持在

Figure 3.21 shows the forces parallel to the plane that are responsible for the equilibrium.

图3.21画出了平行于斜面的、相互保持平衡的几个力。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。