必要条件

Seven polyimides were synthesized and their films were uniaxially stretched to observe the variation in their in-plane birefringence. The creep method of DMA was used instead in stretching the PI films. The preload force and isothermal temperature were the two controlled factors that were chosen on the basis of the lowest stretchable force and lowest temperature for each PI structure. The elongation ratio of a PI film was then decided by the stretching time.

在此是以DMA 的另一种试片拉伸方式-Creep模式，来取代之前的Stress Relaxation模式对PI薄膜试片进行拉伸实验，Creep模式是以最低的拉伸力量及最低的拉伸温度的前提下，选择Pre-load Force与Isothermal Temperature这二项为拉伸控制因素，在此状态下的PI薄膜拉伸比是取决於其拉伸的时间，此种拉伸模式将可得到较高的拉伸比，而高的拉伸比是获取较高薄膜双折射率的必要条件。

More explicitly, there must be connections between words and the world that are direct in the sense that they are unmediated by linguistic-descriptive content—and which, nonetheless, provide the modes of presentation that the satisfaction of Frege's constraint requires.

更明白点说，在语词和世界之间必有关联，这个关联是在'它们通过语言上的描述性内容而无中介的'这个意义上直接的，但是这里的语言上的描述性内容提供的是'满足Frege的约束性必要条件'的the modes of presentation。

It's nessary for the diagnosis of vaginoscope to know the typical image of vaginoscope. It's the effective way for diagnozing CIN,It shows that the more complicated the image the severe of the disease.

正确掌握阴道镜下典型图像是阴道镜诊断的必要条件，是诊断CIN的有效途径，图像越复杂，提示病变越重。

The difference of fluid statics between different infiltration modes was studied. It was found that it was necessary to apply pressure to assure the transverse infiltration even if the C/Mg composite is a wettable composite system.

研究了不同浸渗方式的流体静力学差异，发现即使对于润湿的复合材料体系，外加压力也是保证横向浸渗顺利进行的必要条件。

All results showed that HIV〓 disrupts the stability of negatively charged POPG membrane, but did not influence zwitterionic POPC membranes.

上述四个方面的实验结果都显示HIV〓只破坏带负电荷的POPG脂双层膜的稳定性，但几乎不影响电中性的POPC脂膜的正常状态，说明ⅢV〓发挥其功能的一个必要条件是融合肽和脂膜之间必须存在静电吸引力。

Additional, it is negative situation to net assets, also should demarcate is, must be to pass business of original owner battalion and person of former effective control to realize net assets to be, as the requirement that restores to appear on the market, cannot pass sell case the means of infuse asset realizes net assets to be.

另外，对于净资产为负的情况，也应该限定为，必须是通过原主营业务和原实际控制人实现净资产为正，作为恢复上市的必要条件，不能通过卖壳注入资产的方式实现净资产为正。

While adjudicating officers consider prior travel, having prior travel is not a requirement to receiving a visa.

虽然签证官员会将以前的访美旅行列入考虑范围内，但以前去过美国并不是获得签证的必要条件。

The results obtained are as follows:The liquid cast iron is treated at 1410～1460℃ by admixing of 0.5～0.6%FeSi-Mg-Re,0.5～0.7% Fe-Ti and 0.2% Si-Ca simultaneously.

用这种方法制取蠕虫状石墨铸铁的必要条件是：复合系数K_2=(4.4Ti)/(Mg+1/3Re)=11～26，Ti0.06～0.15％，Mg+1/3Re 0.015～0.036％。

The result that different relaxed systems can reach aggregate equivalence is expanded and analogized with the method of set function in functional space. The existence and necessary conditions for optimal control are obtained.

运用泛函分析空间理论中集值函数，扩展或类推得到了不同松弛系统可达集相同的结论，并且较好地解决了最优控制的存在性及必要条件。

Ascertaining the determinants of government performance is the prerequisite if government performance is to be improved.

而改进绩效的必要条件是明确政府绩效的决定因素。

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。