现状

This article briefly introduces the operating principle of the Gas Air-Condition and both its developing history and current situation at home and abroad.

本文简单介绍了燃气空调的工作原理和其在国内外的发展历史和发展现状。

The development status of domestic safety airbag and their technical yarn was introduced.

介绍了我国安全气囊袋及安全气囊袋用纤维的发展现状。

It is necessary to study the mine ventilation network structure to ensure the airflow stability in mine.

本文首先对矿井通风网络方面的研究现状做了必要阐述。

According to the present situations of the two production lines and the temperature needed by the producing technics of the heat-exchanger , using the numerical simulation with the Airpark software to analyze the reason why the cooling system can not meet the technicals requirement; with the heat transfer theory computation based on the heat transfer principle, the technical parameters of the cooling sect refer to the system technic and configuration are obtained. That are made for reasonable organization of the airflow of the cooling system and the new cooling equipment achieving the technical requirement. At the same time, it will ease the thermal pollution of the circumjacent environment and improve IAQ of the workshop

根据某厂两条换热器生产流水线的现状和冷却降温的工艺要求，用Airpark 软件进行数值模拟，分析了冷却系统无法满足工艺要求的原因；运用传热学原理进行了设备与环境的传热理论分析和计算，分析了冷却系统无法满足工艺要求的原因，得出了改造所需要的技术与结构参数，并对冷却系统进行合理布局与气流组织，使新的冷却系统发挥了应有的作用，满足了生产工艺的要求，同时也减轻了生产环境的热污染，提高了环境的空气品质。

This paper reviews the development of polyvinyl alcohol history and research at home and abroad.

本文综述了聚乙烯醇的发展历程和国内外的研究现状。

Alder is a promising broadleaved species with high growth rate and nitrogen-fixing ability for commercial planting.

就桤木商用种植的生产潜力、制浆造纸和材性研究现状等进行综合评述。

Thesis is devoted to construct and analysis piecewise rational splines, algebraic curve and surface for interpolation.

首先对参数曲线曲面、代数曲线曲面等问题的历史背景和研究现状进行了综述，并归纳了本文所做的工作。

Based on an introduction to the robust control of uncertain linear systems and a survey on the past and recent contributions to the related polynomial algebraic method, state space method and frequency domain method, this dissertation focuses on the robust control problem of uncertain linear systems in frequency and time domain.

本文首先就不确定线性系统的鲁棒控制问题作一扼要的介绍和概括，并分多项式代数方法、状态空间方法和频率域方法对其历史发展及其研究现状进行了比较全面的综述。

In this paper,the recent developments,synthetic situation and bioactivity of alicyclic polysulfide s are reviewed comprehensively in order to find a simpler and more effective synthesis method.

脂环多硫化物是一种新型香料，具有浓郁的特征香味和良好的生物活性。为了寻找更简单高效的合成方法，推动此类香料的研究，详尽探讨了其研究现状、合成进展及生物活性

To calibrate the measuring results of the kingpin obliquity on the four-wheel aligner, a calibration apparatus was developed based on the principle of independent acquisition of the kingpin obliquities in the vertical and horizontal planes of the automobile.

为解决无法检定校准四轮定位仪测量主销倾角结果的现状，提出了在汽车纵横两平面内主销倾角独立生成的检定原则，研发了四轮定位仪检定装置。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。