不变

ReduceMain fractionation tower,s press drop can enhance inlet pressure of compressor.At the condition of compress ratio is invariable,it can improve system pressure、increase NTS of stabilization tower、reduce stabilize gasoline C4 ratio、improve system absorbent ability.Generic design can hardly reach the best NTS of absorber,so adding absorber,NTS can obviously increase effect so absorb. Because adding absorber'NTS can reduce system dependence on other factors,and it can not lead to the increase of the energy,so it is the best economic method of improving absorb operation effect. For desorber,double feed stream is a economical means but it need adding the NTS.

降低主分馏塔的压降，可以提高压缩机的入口压力，在压缩比不变的情况下提高系统压力；增加稳定塔理论板数，可以降低稳定汽油中C4的含量，系统的吸收效果改善；一般的设计和吸收塔的最佳板数相距较大，所以改造吸收塔的理论板数，它对提高吸收效果往往最显著，又因为改善吸收塔的理论板数会降低系统对其它因素的依赖程度，而且改善它并不增加能耗，所以改造它对提高吸收效果又是最经济的手段之一；对于解吸塔来说，双股进料的工艺很有经济效益，但它需要增加理论板数来实现。

Rigid roles enforced by social pressure add up to something else—something I call a naiad dyad.

在社交压力下强迫形成刻板不变的角色是另一种东西--我称之为"水中仙女二元体"

My friend told me that perhaps happiness means lying on the couch watching TV easting junk food and not getting fat.

我朋友曾跟我说也许幸福意味着躺在沙发上看电视，吃着垃圾食品而不变胖。

My friend told me thatperhaps happiness means lying on the couch watching TV easting junkfood and not getting fat.

我朋友曾跟我说也许幸福意味着躺在沙发上看电视，吃着垃圾食品而不变胖。

Moreover, it breaks down stereotypes surrounding effete characters.

更甚者，这个词语打破了关于他们一尘不变的固有观念：颓废的，过于娇柔的。

Nitrogen spring pressure as long as you master the use of pressure gauges, long-term use of elastic constant, life expectancy five million times.

氮气弹簧只要用压力表掌握压力即可，长期使用弹力不变，寿命500万次。

The collagen in this tissue appeared to remain intact and robust in the face of this elastin remodeling.

胶原组织在这方面似乎维持不变，和稳健的，在面对这种弹性蛋白重塑。

The answer given by Coulomb's experiment is that this dependence on distance is the same as in Newton's law of gravitation and Coulomb's law of electrostatics.

我们又一次看到在这个理论中应用了一般的观点，即倾向于用引力和斥力只与不变的粒子之间的距离有关，而且只作用于粒子之间来解释一切现象。

We show a matrix A is similar to an orthogonal matrix over a field of characteristic 2 if and only if ( 1 ) the invariant factors of A are symmetic,(2) A has at least an elementary divisor of the form ( x + 1 ) m.

本文利用矩阵方程证明如下两个结果：设F为一个域char=2，在F上矩阵A相似于一个正交矩阵的充要条件为(1)A的不变因子是对称的。(2)A至少有一个形为(X十1)的初等因子。

Next produced several kind of matrices similar determinations principle, the matrix equally in value from this has similarly drawn out the elementary divisor with the characteristic matrix, invariant factor two related concepts.

其次给出了几种矩阵相似的判定法则，矩阵相似与特征矩阵等价由此引出了初等因子，不变因子两个相关概念。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。