不常

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。

Don't let the noise of others'opinions drown out of your own inner voice.

不要让其他不和谐的声音淹没在常你自己的声音内。

The main works in this paper are as follows:(1). In this thesis, a new method, continuous linearization model, is constructed for the non-linear dynamic systems. The precision Duhamel integration solution for the linearization equation is also given from the theory of linear differential equation. The calculating results show that the new method can improve the calculation precision greatly. In fact, the truncation error is not limited by this method, it can arrive the precision according to the requirement.

本文的主要工作有以下几个方面：(1)由于非线性项的存在，使得多数情况下难以得到非线性动力方程的解析解表达式，目前常使用数值积分方法来求解非线性动力学方程的解，但常规计算方法的计算精度不很理想，本文提出了含Taylor展开项中高阶余项的非线性动力方程的线性化数值计算方法，构造了瞬态线性化方程，给出了Duhamel积分的表达式。

Reticular dysgenesis is an autosomal recessive form of human severe combined immunodeficiency characterized by an early differentiation arrest in the myeloid lineage and impaired lymphoid maturation.

网状细胞发育不全是一种常染色体隐性遗传的人类重症联合免疫缺陷病，其特点是髓系的早期分化停滞以及淋巴成熟受损。

"Echolalia:The immediate and involuntary repetition of words or phrases just spoken by others, often a symptom of autism or some types of schizophrenia ."

言语模仿症：立即且不自觉地重复别人刚刚说过的词或短语，常为孤独症或某些精神分裂症的症状。

However, I was so enamour'd of this place, that I spent much of my time there, for the whole remaining part of the month of July; and tho' upon second thoughts I resolv'd as above, not to remove, yet I built me a little kind of a bower

家是不准备搬了，但我确实非常喜欢那地方。因此，在七月份这一个月中，我常去那儿，并决定在那儿造一间茅舍

However, I was so enamour'd of this place, that I spent much of my time there, for the whole remaining part of the month of July; and tho ' upon second tho ughts I resolv'd as above, not to remove, yet I built me a little kind of a bower

家是不准备搬了，但我确实非常喜欢那地方。因此，在七月份这一个月中，我常去那儿，并决定在那儿造一间茅舍

An organism, such as a mammal or bird, having a body temperature that is constant and largely independent of the temperature of its surroundings; an endotherm.

恒温动物一种体温恒常且不受外界温度影响的生物体，象哺乳动物或鸟；恒温动物

But as it is easy to foresee that from different causes and from different quarters much pains will be taken, many artifices employed, to weaken in your minds the conviction of this truth, as this is the point in your political fortress against which the batteries of internal and external enemies will be most constantly and actively (though often covertly and insidiously) directed, it is of infinite moment that you should properly estimate the immense value of your national union to your collective and individual happiness; that you should cherish a cordial, habitual, and immovable attachment to it; accustoming yourselves to think and speak of it as of the palladium of your political safety and prosperity; watching for its preservation with jealous anxiety; discountenancing whatever may suggest even a suspicion that it can in any event be abandoned, and indignantly frowning upon the first dawning of every attempt to alienate any portion of our country from the rest or to enfeeble the sacred ties which now link together the various parts.

然而，不难预见，会有某些力量试图削弱你们心里对这个真理的信念，这些力量起因不一，来源各异，但均煞费苦心，千方百计地産生作用。其所以如此，是因爲统一是你们政治堡垒中的一个攻击重点，内外敌人的炮火，会不断加紧(虽然常是隐蔽地和阴险地)攻击。因此，当前最重要的是你们应当正确估量民族团结对于你们集体和个人幸福的巨大价值。对于它你们应当怀有诚挚的、一贯的和坚定不移的忠诚；你们在思想上和言谈中应习惯于把它当作政治安定和繁荣的保护神，你们要小心翼翼地维护它。如果有人提到这种信念在某种情况下可以拋弃，即使那只是猜想，也不应当表示支持，如果有人企图使我国的一部分脱离其余部分，或想削弱现在联系各部份的神圣纽带，只要他们一提出来，你们就应当予以怒斥。

The independence of enteritis is not a disease, it often involves extensive stomach and colon.

肠炎不是一种独立性疾病，它常广泛地涉及胃和结肠。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。