查询词典 protective

Research to monitor the worldwide amount of chlorofluorocarbon chemicals, or CFCs, which eat away at the protective ozone layer when released into the atmosphere, suggests that more of the chemicals are out there than expected.

目前人们正在开展一项研究，目的是监视全球的含氯氟烃数量，这种化学物质在被释放到大气中之后就会侵蚀起保护作用的臭氧层。该研究表明：大气中的这种化学物质比预期的更多。

Ozone Layer Success: Another indicator of success for Goal 7 is the world's consumption of chlorofluorocarbons, which are chemicals that deplete the ozone layer, the Earth's protective shield.

臭氧层成功：成功的另一个指标的目标7是世界上消费的氯氟化碳，这是化学品，消耗臭氧层，地球的保护伞。

The influence of added methyl acrylate on the emulsion copolymerization of methacrylic acid and chloroprene in the presence of polyvinyl alcohol as a protective colloid was investigated.

研究了丙烯酸甲酯对聚乙烯醇为乳化剂的氯丁二烯和甲基丙烯酸乳液共聚合的影响。

Objective To investigate the protective effects of cholecystokinin octapeptide (CCK-8) on lung ischemia- reperfusion injury in rats and its possible mechanisms.

目的 观察八肽胆囊收缩（CCK-8）对大鼠肺缺血再灌注损伤的保护作用及其可能机制。

A protective effect of choline on myocardial ischemia-reperfusion injury in rats in vitro was observed.

胆碱对离体大鼠心肌缺血／再灌注损伤具有保护作用。

ONO-5046 can inhibit the elevation of CINC, the CINC mRNA expression and early neutrophil accumulation in the pancreas, and have protective effects on the ischemia/reperfusion injury of pancreaticoduodenal transplantation.

ONO-5046能抑制CINC的升高及CINC mRNA的表达，抑制中性粒细胞的浸润，对再灌注损伤具有保护作用。

Later, it makes some comparison with four kinds of modulation technique, and finally, it implements the three-level PWM switching power amplifier with the PWM technique. The power of the amplifier is 2kVA, and the frequency bandwidth is 10～3kHz. In the thesis, the author designs and makes the hardwares of the switching power amplifier. The hardwares contain power inverter rank circuit, control system circuit based on DSP, drive and isolation circuit, and protective circuit. The thesis also analyses the potential safety problems and put forward some solutions for the problems. Furthermore, the thesis accomplishes the software design of the control system, and successfully debugs it. The methods of designing higher power ampilfier are also discussed in the thesis. It analyses the feasibility of the methods, outlines the way of how to design higher power switching power amplifier, and does some experiments with the method of switches-parallelling.

根据电动振动试验系统对开关功放的要求，提出了以电感电流瞬时值控制技术为基础的三电平脉宽调制开关功放的设计方案，并通过系统仿真进行了原理性论证；然后设计并制作了开关功放的硬件，包括功率转换电路，基于DSP的控制电路，驱动、隔离电路以及保护电路；针对开关功放数学模型不易得出的特点，细致分析了模糊自适应PID控制方法，在此基础上编写了控制程序；研制出一台功率为2kVA，通频带为10～3kHz的三电平脉宽调制开关功放；论文中还探讨了实现大功率开关功放的方法，分析了各种方法的可行性，给出了实现大功率开关功放的思路，并进行了并联开关管实现大功率开关功放的实验。

Through analyzing the reasons of the circumvallation s damage and discussing the value of the circumvallation and the significance of the preservation, feasible suggestions have been made on the basis of existing protective measures: the preservation of the ancient circumvallation should rely on the whole society which should use the advanced technologies and methods and adopt legal means so as to provide reference for the theory and practice of the preservation of the ancient circumvallation in jingzhou city.

分析古城墙遭到破坏的原因，探讨古城墙的价值及其保护的重要意义，在现有保护措施的基础上提出了一些可行性的保护建议：古城墙的保护要依靠全社会的力量，运用先进的技术和方法，采取法律的手段，为荆州古城墙的保护理论和实践工作提供参考。

Optimals Comfort combines a moisturising complex and protective cloudberry seed oil to deeply nourish and moisturise dry skin. It softens, smoothes and also calms the skin.

纯净瑞典水润系列蕴含高保湿复合成分和具有保护功能的黄莓种子油精华，能深入滋养和滋润干性肌肤，令肌肤柔软、光滑、舒适。

To understand implementation effects of occupational hazard protective measures in a coal chemical industry.

目的 了解某煤化工企业职业病危害防护措施的实施效果。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。