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The stability and convergence for spectral methods and spectral element methods are presented, with the aid of the knowledge of functional analysis and calculus and with the help of the theorem of Lax-Milagram, the stability and convergence for steady problems, evolution equations and Navier-Stokes Equations are analyzed in detail.

利用泛函分析和微积分的基本知识，运用Lax-Milagram定理等，从理论上比较详细地分析了谱方法和谱元方法在定常问题、非定常问题以及求解Navier-Stokes方程方面的稳定性和收敛性问题，得出了Navier-Stokes方程谱近似的稳定性条件和收敛性准则。

As a simple and convenient teaching aid, Galton board is widely introduced in textbooks of high schools and universities.

Galton板作为一种简单可行的教具，在高中、大学的有关教材中都有所介绍。

Getting into the spirit of things and, perhaps, in a bid to aid national rapprochement, he gamely donned a pink turban.

或许是感染到当地的气氛，抑或是试图帮助改善两国关系，他勇敢地扎上一根粉红色的头巾。

In the case ofreflectionlessness,after determining the gauge transformation,expressions of multi-soliton solutions of the L-L equation with an easy plane are obtained explicitly bysolving the linear algebraic equations with the aid of the well-known Binet-Canchyformula.

由于要克服因Jost解在参数趋于无穷时不独立于L-L方程的解的困难，必须引进规范变换，这是不涉及微分方程的Riemann问题方法无法解决的。

It is reported, passenger liner of Lan Gena date will be in the song Shi Daai of boat of bag of place of net of hundred Cheng journey to will mix 30 days to set out from Tianjin harbor on July 18, 2008, part the deer of the aid city island of berth Korea, Japan island and Fu Gang, return Tianjin and Shanghai finally.

据悉，佰程旅行网所包航的歌诗达爱兰歌娜号邮轮将在2008年7月18日和30日从天津港出发，分别停靠韩国的济州岛、日本的鹿儿岛和福冈，最后返回天津和上海。

In an emergency, if we were to panic, we would not be able to give proper first aid.

紧急情况下，万一我们惊慌的话，我们就不能对别人进行正确的急救。

If you have it in your area, call 9-1-1, then give first aid when appropriate.

如果你所在的地区有9-1-1，拨打这个电话，并适当地进行急救。

The doctors there taught us how to give basic first aid to patients in different emergencies.

那的医生教我们怎样在不同的紧急情况下对病人实施基本的急救。

As the world's group of rich countries discusses aid to Africa, a correspondent who lived in Kenya four decades ago looks glumly at it now—but sees glints of hope

正当世界的富国群体大谈非洲援助的时候，一位在40年前生活于肯尼亚的通讯记者对此感到伤感－但却看到了希望在闪烁。

Increases in grant aid will replace loans.

更多的援助将替代贷款。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。