不稳定性

Based on the nonlinear dispersion relation of electromagnetic wave in relativistic plasma, the nonlinear controlling equation for linearly polarized mode is obtained using Karpman's method. The modulation instability of intense laser pulse propagating through relativistic plasma is analyzed and the modulation instability growth rate as a function of perturbation wave number for laser beam propagating through relativistic plasma is given.

从相对论等离体中电磁波的非线性色散方程出发，利用Karpman方法获得了线性偏振波模所满足的非线性控制方程，在非线性色散方程和非线性控制方程的基础上对线性偏振激光在相对论等离体中传播的调制不稳定性进行分析，给出了调制不稳定的时间增长率与扰动态波数之间的函数关系。

Often unable guarantee of block of wood stability experiment bear fruit compatibility disturbing photolithographic system in initial stage , laser studying.

在研究初期，激光干扰光刻系统的不稳定性常常不能保证实验结果的一致性。

In our views, the region of the CMI, near the ionosphere of Saturn (1 Saturn radius above the polar area), is regarded as the same area as the Saturn's Kilometric Radiation Source.In this paper, we deduce that the KHI will appear before 11 LT (Saturn's Local Time), the Alfven wave will take 383 min to reach Saturn, the sunward magnetic line will bend almost 80°. Finally, we get the distribution of SKR source. It locates from 7～9 LT at a relatively lower latitude to 18 LT at the eveningside.

本文求出了磁层顶附近开尔文-亥姆霍兹不稳定性发生在土星本地时（Saturn's Local Time）11 LT以前，得出了阿尔芬波沿磁力线传播到土星需要约383 min，求解出向阳面磁力线弯曲了约80°，最后得出土星千米波辐射源分布从黎明段的7～9 LT延伸到傍晚段的18 LT，并且黎明段分布的纬度比傍晚段低。

In our views, the region of the CMI, near the ionosphere of Saturn (1 Saturn radius above the polar area), is regarded as the same area as the Saturn's Kilometric Radiation Source. In this paper, we deduce that the Kill will appear before 11 LT (Saturn's Local Time), the Alfven wave will take 38.3min to reach Saturn, the sunward magnetic line will bend almost 80°. Finally, we get the distribution of SKR source. It locates from 7~9 LT at a relatively lower latitude to 18 LT at the eveningside.

本文求出了磁层顶附近开尔文－亥姆霍兹不稳定性发生在土星本地时(Satrun's Local Time)11LT以前，得出了阿尔芬波沿磁力线传播到土星需要约38.3min，求解出向阳面磁力线弯曲了约80°，最后得出土星千米波辐射源分布从黎明段的7~9LT延伸到傍晚段的18LT，并且黎明段分布的纬度比傍晚段低。

It is very important for the particle factories as there are strong multi bunch positron beams to be operated.

文章讨论了在北京正负电子对撞机上开展的束流光电子不稳定性实验和模拟分析研究

Our hypothesis is that there may be different molecular changes under the precancerous lesions with similar morphology.

我们的假设是：形态学相似的癌前病变可能具有不同的分子变化，这种分子变化可能是导致癌前病变不稳定性发展的关键因素。

It could provide a better sense of just how precarious China's finances may be.

这大概对中国的财政不稳定性提供了更好的认识。

This is the perfect death for a true warrior, who has lived with constant awareness and acceptance of the precariousness and transitory nature of existence.

这是一个完美的死亡的一个真正的战士，谁住的不断认识和接受程度的不稳定性和过渡性质的存在。

With high frequency of worldwide financial crisis, the focal point about the exchange rate arrangement turns to the precautious ability of each kind of exchange rate regime. The discussion of academia concentrates on which kind of exchange rate regime can better deal with international capital mobility and instability of world capital market.

随着世界范围内的金融危机的不断发生，有关汇率制度选择的关注重点也转向每种汇率制度安排在防范风险的能力方面，讨论集中于哪一种汇率制度更适合应付日益增长的国际资本流动性与世界资本市场的不稳定性。

The pretzel scheme to increase the number of bunches, hence, the luminosity ofBEPC have been studied.

本论文的主要工作是BEPC实现多束团对撞的研究和耦合束不稳定性的研究。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷