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From the theory and examples, the article points out why in the symmetric block the calculation of the double integral is easy to go wrong and offers some methods to avoid errors.

从理论和实例两个方面，指出了对称区域上二重积分计算中易出现问题的原因，并给出了避免错误的方法。

In this thesis, the virtual boundary integral equation is based on double layer potential with the virtual density to be determined on virtual boundary. Since this integral equation related to double layer potential only involves the computation of the normal derivative and second normal derivative of fundamental solution, the exponential integral function is not involved in it, so numerical computation for the exponential integral function is avoid.

本文则基于双层位势，引入虚拟矩密度函数来建立虚边界积分方程，并首先对时间变量进行解析积分，在虚、实边界上采用常单元和等额配点离散，该方程只涉及含基本解的法向导数及其二阶法向导数项的计算，对时间变量进行解析积分后，不会出现对指数积分函数的空间变量的积分计算。

The new sieve tray tower of carrier gas evaporation can be installed with multiplayer sieve trays, and has double concentration ratio as compared with that of general sieve tray towers, and can be operated under vacuum conditions, which can avoid the leakage of acrylamide.

依据新方法开发的新型载气蒸发筛板塔可采用多层塔板操作，该塔与未设置加热管且塔板较少的情况相比，浓缩比可以提高1倍；采用负压操作，可以避免丙烯酰胺泄漏。

On the basis, further isolated-living condition and moderate unpredictable stress are applied successively to set up PSD rat model . The neurological functional recovery of stroke rat is assessed by Longa 5 grades and horizontal bar test.Sucrose solution consumption test, open-field test and passive avoid test are used to estimate the change of interest, the level of spontaneous motor activities and investigative behavior of PSD rat model.Fluorophotometry is applied to detect the monoamine neurotransmitters(NE,5-HT and DA) of the double frontal-parietal cortexes and brain stem. Investigating the action of YuLeShu on the neurological functional recovery of stroke rat.

运用Longa5法和水平木棒法评定卒中大鼠神经功能恢复；运用糖水实验、敞箱实验、被动躲避实验评定PSD大鼠的兴趣感变化和自发活动、探究行为等抑郁行为学改变；采用荧光分光度法测定双侧额顶皮层及脑干的单胺递质：去甲肾上腺素(Norepinephrine，NE)、5-羟色胺(5-Hydroxytryptamine，5-HT)、多巴胺(Dopamine，DA)含量。

Based on the oil-water flow rate and density obtained with a double-U Coriolis flow meter, and by the help of Support Vector Machine, a direct prediction method of the oil-water respective mass flow rate was developed to avoid the need of study on the complex relation between the slip velocity, water hold up and water fraction.

以双U型Coriolis流量计得到的油水混合物的质量流量和密度为基础，提出了基于支持向量机油水分相质量流量的直接预测方法，避开了直接对滑脱速度、持水率与含水率等之间复杂关系的研究。

Based on the general principle of value, and by analyzing the instrument value and destination value of its study and application, this article is trying to disclose the diversity, the complication and the doubleness of its value, to point out the practical meaning of the study and to establish an evaluation system to judge it objectively and reasonably, thus imposing the necessary limit on its value. In this way, we can make the most of its positive side and avoid or dispel its negative side.

本文立足于价值的一般原理，通过对克隆技术研究和应用的工具价值和目的价值的全面剖析，揭示其价值的多样性、复杂性和正负两面性，指出对其价值限度研究的实践意义，并且尝试建构一套价值评判体系对克隆技术进行客观、合理的价值判断，以此实现对克隆技术价值的必要限度，使之最大程度地发挥正价值，避免或消解其负价值。

You should avoid putting doubles in your code if you include this statement.

其次，你应该避免在你的程序中使用到double类型。

Some African rulers who don't like the idea of democracy, the best example being in Angola, can try to use Chinese loans to avoid having to hold elections. The Chinese like dealing with non-democratic governments, says Mr Dowden.

英国皇家非洲学会会长理查德·道邓表示："很多中国省级政府都在非洲积极活动，他们主要只是想获得矿产，然后抽身而去。"

A few years after arriving, he took the little money he'd saved and a $10,000 grant from Temple University to make his thesis film,'Landing,' about the kind of immigrant experience he himself had been anxious to avoid -- the 35-minute story of a Chinese cellist who ends up a down-and-out Chinatown delivery boy.

到美国几年后，他靠自己的一点积蓄和天普大学给予的10，000美元赞助开始制作一部电影作为毕业作品。电影的名字叫《着陆》，讲述的是他自己一直想避免遇到的移民经历──用35分钟时间讲述了一位中国大提琴演奏者最终沦为唐人街送外卖伙计的故事。

To avoid the downgrading of university quality, the education authorities are considering imposing minimum score requirements next year.

为了避免大学品质走下坡，教育有关当局考虑明年设立最低入学要求。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"