可避免的

The exact form of exterior boundary value problems for plane potential problem is established with variational principle.

使用变分法确立平面 Laplace外问题的确切形式；在此基础上，为了避免使用无限区域上的 Green公式，通过构造紧支集上的无穷可微函数，获得满足非齐次控制微分方程的特解的重要结果。

According to the partial research work of a project supported by the NSFC, this paper made an investigation in detail on the dynamics, the performance and the cataphoresis effect of Ca+ recombination laser excited by high repetition rate pulsed discharge.

高频脉冲电泳式He-Ca+复合激光与传统的He-Ca+复合激光相比，具有避免阻挡光路、能够相对独立控制钙蒸气压强、维持长期稳定放电和较长寿命的特点，能同时输出几百毫瓦功率的近红外RM跃迁激光和近紫外的复合激光，在微电子技术、激光治疗和可调激光器泵浦源等方面具有广泛的应用前景。

This paper also discussed the pragmatic causes and semantic conditions of duo, and concluded that the speaker uses duo to compensate the meaning to avoid distortion when simplifying a complex quantity expression. The position of duo in a quantity-representing phrase is determined by the position in which it can be semantically specified.

文章还探讨了"多"字使用的语用动因和语义条件，认为其语用动因是说话人简化了较复杂的量而又为避免失真误导而做的补偿；一个表量词组在什么地方可以使用量代词"多"，取决于这个表量词组语义上在哪个位置有可再细化的空间。

From the numerical results of critical conicity calculatians for bogies with different steering stiffness and different construction parameters, the paper concludes that the low conicity instability can be reduced by means of optimizing the bogie parameters to a va...

得到不同导向刚度下产生失稳的临界踏面锥度和不同锥度下的临界速度值。研究发现，通过参数的合理匹配，可使临界锥度降至常见最小锥度以下，从而可以避免低锥度失稳，为迫导向转向架的参数设计提出了一个新的准则。

To maintain its internal structure and maintainability, evolution steps should be performed in a disciplined way, and consistency conditions should be explicitly and formally defined, and thus can be verified and maintained during the evolution process.

为避免破坏开发系统的内部结构和降低系统的可维护性，软件演化应当以规范的方式进行，一致性条件应该有显式的严格定义，并应该在演化过程中得到检查和维护。

So, using magnesia and calcia crucible in VIF respectively, the experiments on deep deoxidation by carbon and the phenomenon of oxygen contamination from crucible materials in the molten steel under some temperature and vacuity and oxygen content of the molten steel were made and it were found that properly low melting temperature and vacuity helped to lighten and even avoid oxygen contamination from crucible material and the refining effect of final oxygen content of 5×10-4% in the molten steel was achieved using calcia crucible with better resistance to thermal shock under higher vacuity.

为此，分别采用MgO炉衬与CaO炉衬，在真空感应炉中对钢液用碳进行深脱氧和炉衬供氧现象实验研究，发现：(1)在适当低的熔炼温度和真空度下，可以减轻甚至避免炉衬热分解向钢液供氧；(2)采用热稳定性优越的CaO炉衬，在较高的真空度下可达到钢液最终全氧含量低于5×10-4%的精炼效果。

The salt component calcium chloride entrained in the precipitation of trimeric cyanamide phosphate can be fully removed in the mass ratio of solid to liquid 15, at temperature 40 ℃, stirring time 60 min and repeatedly washing three times with water.

该工艺路线可行，反应条件温和，中间媒质三聚氰胺可循环使用，以氯化钙副产品替代了磷石膏的产出，减缓了硫资源的消耗，避免了硫酸根对三聚氰胺沉淀的影响，适合于贫磷矿资源的开发。

Based on this, to avoid using the Green′s formula on infinite domain, an infinitely differentiable function with compact subset is constructed and some important results to a especial solution of the inhomogeneous field equation are obtained.

在此基础上，为了避免使用无限区域上的 Green公式，通过构造紧支集上的无穷可微函数，获得满足非齐次控制微分方程的特解的重要结果。

Aiming at these problems, an expectation maximum based MAP algorithm is proposed and the performance is analyzed. The proposed algorithm avoids large matrix operations by using the EM algorithm to decompose the MIMO channel estimation problem into a series of single input single output problems. Besides, a joint estimation is carried out over multiple OFDM symbols in order to enhance the data transmission efficiency and the estimative performance of the proposed algorithm.

该算法利用EM算法把多输入输出信道估计问题化简为一系列独立的单输入输出问题，避免了大规模矩阵运算，降低了MAP算法的计算复杂度；为进一步改善MAP算法的数据传输效率及其估计性能，可通过对多个连续的OFDM符号进行联合信道估计。

Almost every fan outside the window, a tree planted trees, so that in the view window beauty while another cool either, avoid the use of the rooms have large windows and the negative impact of rising heat.

几乎每扇窗户的外面，都种上了一棵小树，这样一来，在欣赏窗外美景的同时，又有凉可乘，避免了由于使用大窗而带来的房间热量上升的负面影响。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。