封闭

As this happens, the intake valve closes. The exhaust valve is also closed, so that the cylinder is sealed.

同时，进气门关闭，排气门也关闭，所以这时的气缸是封闭的。

With the rapid development of economic integration and constant improvement of degree of openness in the most of countries, intercourse of the trade and financial field becomes more and more frequent. Under this kind of background, economic fluctuation is easy to take place because of external shocks through foreign trade, international capital flow and other channels. So, the research of economic cycle can not be taken only in closed environment. Focusing on the open e conomy, the discussion of influence on the economic cycle fluctuation from external shocks have rather important significance.

随着全球经济一体化的迅猛发展，各国经济开放程度不断提高，各国间贸易与金融领域的交往也日趋频繁，在这种背景下，通过对外贸易、国际资本流动等渠道本国的经济将会受到外来冲击的影响而发生波动，因此，对经济周期的研究不能仅停留在封闭条件下，着眼于开放经济的背景，探讨外来冲击对一国经济周期波动的影响具有相当重要的意义。

Refrigeration units using semi-enclosed water-cooled cold water variable units winter heating using gas-water heat interchanger, and the summer season starts transition, using cooling towers Kongleng system.

制冷机组采用半封闭螺杆水冷式冷水机组，冬季采暖采用气-水换热器，对于夏季和过渡季节的供冷，采用冷却塔空冷系统。

Instead of an ordinary discipline of history, however, the history of science is an intercross field of study.

所以不应该是一个封闭的，而应该是一个开放的领域。

The interior surface of the cylinder (100), the piston (106), and the working fluid container (130) defines a closed space filled by the working fluid.

液压缸（100）的内表面、活塞（106）和工作流体容器（130）一起限定了一个由工作流体充填的封闭空间。

The zero-contours of the real and imaginary parts of complex amplitude are closed curves. The number of intersection points of the zero-contour of the real and imaginary parts is even, and positive and negative singularities are equal.

复振幅的实部和虚部零值线多为封闭的曲线，零值线交点的个数为偶数，并且正负相位奇异点的个数相等。

The resistance to penicillin and cefotaxime of S. pneumoniae strains was examined after CiaH and CiaR were extracellularly and intracellularly blocked by the IgGs.

检测IgG胞外或胞内封闭肺炎链球菌菌株CiaH和CiaR后，细菌对青霉素和头孢噻肟耐药性的变化。

To sustain a proximate intrapersonal relationship...

去维持一个近乎封闭的人际关系。。。

A proximate intrapersonal relationship...

近乎封闭人际关系。。。

RESULTS: Complex language surroundings, intrapsychical self-isolated and improper educational attitude of parents were main reasons of language development delay.

结果：复杂的语言环境、内心的自我封闭以及父母不合理的教养态度是导致该儿童语言发展迟缓的主要原因。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失