等环的

By applying the tools such as modulus of curves and rings, together with Rohde s theorem, it proves that a homeomorphism is a bi Lipschitz map if and only if it satisfies a logarithmically absolute value inequality of rings.

运用曲线族的模和环模等工具，结合 Rohde定理，证明同胚为双 Lipschitz映射的充要条件是：它适合环的对数绝对值不等式；还得到了同胚为拟共形映射的一个充分条件。

The synthesis methods of energetic salts and energetic ionic liquids(cations including triazole, tetrazole, bridged azole, hexamethyenetetrammonia, etc;and anions including nitrate, perchlorate, azide, tetranitratealuminate, polycyan anion, N,N'-dinitrourea, etc.) are reviewed, and the effects of cations, anions and their substitution groups on melting point, enthalpy of formation, density of the materials are summarized.

本文综述了多种含能盐和含能离子液体（阳离子包括三唑、四唑、双环唑、六次甲基四胺等；阴离子包括硝酸根、高氯酸根、硝基唑、叠氮根、四硝基铝、多腈基化合物、二硝基尿素等）的合成；结合其表征结果分析了阳离子上的取代基以及阴阳离子对它们的性能如熔点、生成焓、密度等的影响。

One aspect that has not received a thorough investigation is the processing of the polymer between injection and the non-return valve.

而关于聚合物熔体在注射螺杆和止逆环之间的流动过程以及止逆环的设计对制品质量的影响等的研究涉及较少。

A new distribution is proposed for the sake of the disadvantage of the constant circulation at present. The axial velocity in fornt of the blade intake along the radius reduces linearly, and the velocity trendline behind the blade export is close to parabolic curve, but the circulation should be decided by designers.

文中还对轴流泵设计有重要影响的流型进行了全面的分析和研究，指出现有等环量流型存在的不足，提出了改进流型设计：轴面速度在进口边前直线下降、出口边后呈抛物线分布、环量的分布规律由设计人员给定。

The existence of hydrogen bond within or between the molecules of pigment can enhance the perdurability, light fastness and weather resistance.

有机颜料发色母体最主要的是偶氮和酞菁两大类(分别为50%和25%)，其余25%的颜料属于杂环的发色体：喹吖啶酮、异吲哚啉与异吲哚啉酮、苝、喹酞酮、二噁嗪、吡咯并吡咯二酮、金属络合颜料、靛族和稠环酮颜料(如：蒽醌、黄蒽酮、皮蒽酮等)。

The advances of the composition and function of xanthophyll cycle in higher plants, the structure, biochemical properties and regulation of violaxanthin de-epoxidase and zeaxanthin epoxidase, and convertibility and localization of xanthophyll during the last few years are reviewed.

对近几年来植物体内叶黄素循环的组成、能、菜黄素脱环氧化酶和玉米黄素环氧化酶的结构、化性质和调节，以及叶黄素的可转变性、位等方面的研究进展作了综述。

The tin hydride mediated alkenyl radical translocation/ cyclization process developed by Curran et al. represents a powerful procedure for the preparation of functionalized fivemembered rings by selective activation of a CH bond.

Curran等开发的以锡氢化物作为炔烃基团转位/环化反应的介质代表了用碳氢三键选择性活化法制备五员环官能团的高效反应步骤[2，3]。

The bacterial, mammalian and plant cytochrome P450s involved in metabolism of herbicides are reviewed in this paper. The action modes of cytochrome P450s on herbicides including dealkylation, ring-methyl hydroxylation and aromatic ring hydroxylation etc are summarized.

本文综述了代谢除草剂的细菌、哺乳动物和植物细胞色素P450酶系，概述了细胞色素P450酶系参与除草剂代谢的作用方式：脱烷基化作用、环甲基化羟基化作用和芳环的羟基化作用等。

Mainly introduced SIEMENS PLC is a controller, realizes this system chain preheating machine, the rotary kiln calcines the fever, cold machine cooling, the end product goes into storage and so on the link control, including each host auxiliary engine equipment chain-like control, temperature,pressure, speed control and so on various return routes central control and so on.

主要介绍了以西门子PLC为控制器，实现该系统的链蓖机预热、回转窑煅烧、环冷机冷却、成品入库等环节的控制，包括各主辅机设备的连锁控制，温度、压力、速度控制等各回路中央控制等。

Analysis of the main reasons is because of fatigue caused by factors such as the copper support ring was broken and the piston rod in the hydraulic cylinder telescopic frequently, the fracture茬口constantly scraping the inner wall hydraulic cylinder mill will pick缸壁, resulting in injury China, so that the speed of decline in hydraulic cylinder; job with the passage of time, strain and缸壁sealing ring, wear ring injuries are increasing, with China to increase the volume, and finally resulted in a serious decline in the speed of hydraulic cylinders.

分析主要原因是，由于疲劳等因素造成的铜质支撑环断裂，在液压缸活塞杆的频繁伸缩中，断裂茬口不断刮磨液压缸内壁，将缸壁拉毛、拉伤而导致内泄，使液压缸速度下降；随着工作时间的推移，缸壁拉伤和密封环、耐磨环的损伤都不断加重，内泄量加大，最后造成液压缸速度严重下降。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。