- 更多网络例句与等环的相关的网络例句 [注：此内容来源于网络，仅供参考]
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Results Two new characterizations of regular rings are given.(1) If R is a left SF'-ring and R/Z is reduced, then R is strongly regular;(2) R is strongly regular if and only if R is a left SF'-ring whose every idempotent element of R is left semi-center and is LANE-ring.
结果 得到了SF'-环是强正则环的两个充要条件：(1)R是左SF'-环，如果R/Z是约化的，则R是强正则环；(2)R是强正则环当且仅当R是满足幂等元左半中心的左SF'-环，且R是LANE-环。
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The chapter 1 introduces the background of imidazole, thiazole, tetrazole derivatives and their glycosides, and organic solid phase research.
论文第一章介绍了咪唑环、噻唑环、四氮唑环等杂环的合成，总结了糖苷的合成方法，对杂环的固相合成化学进行了简单介绍。
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This paper is generaly devided into three parts,The first prepare knowledge,introduceing some conceptions asssociated with the polynomial ring and ring of power series such as power-zero element,inverse element and primitive polynomia and so on,prepare to introduce characters of power series.
本文主要分为以下三部分：首先介绍与环、多项式环、幂级数环密切相关的一些概念，如幂零元、可逆元、本原多项式等，为接下来介绍幂级数环的定义及其性质做下铺垫；然后着重讨论了环的性质，加深对多项式环与幂级数环的理解；最后讨论了多项式的性质，并将这些性质推广到幂级数环中，这也是本文的重点所在。
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In 1999, Nicholson further introduced the concept of strong clean rings as follows: A ring R is said to be strongly clean if every element of R is the sum of an idempotent element and an invertible element that commute with each other.
W.K.Nicholson进一步引入了强clean 环的定义：一个环R 被称为强clean环，如果R中的任意一个元素均可以表示成一个幂等元和一个单位和的形式，并且幂等元和单位可换。
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II, Polynomial rings on a general field( on contrast of those over a number field): concepts of ring, ideals, field and several special rings as domains, principal ideal domains and unique factorization domains, the unique factorization theory of polynomial rings.
二、一般域上的多项式理论（是数域上多项式理论的推广）：学习环、域和几类特殊结构的环（整环、主理想环，唯一分解环等）的概念，多项式环的唯一分解定理；三、线性代数：讲述一般数域上的向量空间理论（是数域上向量空间理论的继续和推广），模的概念，主理想环上的模的结构及其线性变换的若当标准型等；四、一元多项式的解及域论：学习域扩张及其相关概念，伽罗瓦理论，用伽罗瓦定理判断根式解的存在性。
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During the investigation of the reactivity of O_SCl_2(PPh_3)_2CH=C(PPh_3CHCH=CH_2 and O_SCl_2(PPh_3)_2CH=C(PPh_3C(=CH_2)CH=CH2, several stable osmacycles with novel structure, such as osmabenzenes, osmafurans, osmacycles containing intramolecular-coordinated allene, intramolecular-coordination osmacycles containing osmacarbene, an osmacyclopentadiene, were isolated during the investigation of the reactivity of O_SCl_2(PPh_3)_2CH=C(PPh_3CHCH=CH_2 and O_SCl_2(PPh_3)_2-CH=C(PPh_3C(=CH_2)CH=CH_2.In addition, some convenient and efficient methods to prepare these osmacycles were developed.
首先，合成出两种具有反应活性的金属杂五元环IC配合物OsCl_2(PPh_3)_2CH=C(PPh_3CHCH=CH_2和OsCl_2(PPh_3)_2CH=C(PPh_3C(=CH_2)-CH=CH_2，并对它们进行了系统表征；进而，研究了这些活性五元配合物的反应性，合成出多种稳定的锇杂环配合物，其中包括锇苯、锇呋喃、含配位联烯的锇杂IC环化合化物、含锇卡宾的IC环化物、首例锇杂环戊二烯化合物等多元化的产物。
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In order to search for the new pyrazolyl-heterocycles lead compounds, eight pyrazolyl- were synthesized from 3-ethyl-1-methyl- 4-substituted-5-pyrazolecarboxylic acid chloride and nitrogen heterocyclic rings such as 3-methyl-5-pyrazolone, 1H-3-ethyl-5-pyrazole ester, etc.
为了寻求新的含吡唑双杂环先导化合物，用 4 取代 1 甲基 3 乙基 5 吡唑甲酰氯与 3 甲基 5 吡唑酮、3 乙基 5 吡唑甲酸乙酯等含氮杂环反应得到了 8个新的含吡唑环的双杂环类化合物。
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The comparison of petrology, lithofacies, petro-geochemistry and tectonic environment of the rapakivi granite both from Qinling-Kunlun and world shows that the rapakivi granite has same or consistent characteristics: rapakivi structure, sub-aluminous, high-potassic, alkali-rich magma, two-peak magma assemblage and formed in post-collision environment. However, there are some certain differences in some geochemical index, forming age of magma, and geotectonic position of outcropping.
通过秦岭－昆仑造山带中的环斑花岗岩同世界元古宙环斑花岗岩的岩石学、岩相学、岩石地球化学和构造环境等方面的对比研究发现，二者具有相同或一致的特征：具环斑结构，属准铝、高钾、富碱岩浆，具双峰式岩浆组合，形成于后碰撞环境，但其地球化学的某些指标、岩浆形成时代和出露的大地构造位置等有一定差异。
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Bulk ceramic tower packing has excellent acid and heat resistance, except hydrofluoric acid outside the capability of various inorganic acids, organic acids and organic solvents, corrosion can be a variety of high-temperature, low-temperature occasions the use of a wide range of applications can be used to chemical industry, metallurgy, gas, oxygen and other industries drying tower, absorption tower, cooling tower, regeneration tower Jincheng packing are: Raschig rings, wash ring, different saddle ring, low ring, cross ring, pall ring, moment saddle ring, ladder ring, SK chain, combined plum blossom ring.
陶瓷散堆塔填料具有优异的耐酸耐热性能，能耐除氢氟酸以外的各种无机酸、有机酸及有机溶剂的腐蚀，可在各种高温、低温场合使用，应用范围十分广泛，可用于化工、冶金、煤气、制氧等行业的干燥塔、吸收塔、冷却塔、再生塔等。金诚填料有：拉西环、洗涤环、异鞍环、低环、十字环、鲍尔环、矩鞍环、阶梯环、 SK 连环、组合梅花环等。
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Reaction of citric acid with paraformaldehyde gave anhydromethylene citric acid with a yield of 63%;the reaction of compound with acetic anhydride gave the corresponding anhydride with a yield of 87%;the esterification of compound with lauryl alcohol gave anhydrocitric acid monoester with a yield of 76%.
将等浓度的柠檬酸和多聚甲醛加热，反应生成柠檬酸缩醛环酯，产率为63%；与乙酸酐反应得到相应的柠檬酸酐，产率为87%；与月桂醇酯化，生成产物，产率为76%；用二氧六环做溶剂，将与等浓度的碱进行开环反应，生成柠檬酸月桂醇单酯，产率为83%。
- 更多网络解释与等环的相关的网络解释 [注：此内容来源于网络，仅供参考]
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Donut：环
2.练习直线(LINE)、圆(CIRCLE)、圆弧(ARC)、圆环(DONUT)、多义线(PLINE)、矩形(RECTANG)、多边形(POLYGON)、椭圆(ELLIPSE)等绘图命令的使用方法. 3.练习修剪(TRIM)和断开(BREAK)等命令的使用方法,注意两个命令的区别.
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snap ring：卡环
精和,是止动环,卡环(Snap Ring)的专业制造厂家,多年来致力于止动环卡环的生产和开发. 主要生产IS0464;GB/T305;DIN5417等标准系列的SP;NR;WR;WRE;BR;AR;SB止动环、卡环;以及FMG;MR;SL;TR;等轴承卡簧;电机轴承径向止动环;轴承锁圈等产品.
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equally spaced：等距的,等间距的
Equally sided 等边的 | Equally spaced 等距的,等间距的 | Equatorial profile 环带外形
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heterocyclic compound：杂环化合物
杂环化合物 杂环化合物(heterocyclic compound) 杂环化合物是分子中含有杂环结构的有机化合物. 构成环的原子除碳原子外,还至少含有一个杂原子. 杂原子包括氧、硫、氮等. 从理论
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isochronal,isochronic：等时的
同色;等色 isochromous | 等时的 isochronal;isochronic | 等时性环 isochrones
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arcus senilis：老年环
如脂肪变性、钙质沉着、玻璃样变性等. 确切的原因不明,有的表现为家族遗传性. 一、老年环(arcus senilis) 老年环是最常见的一种双侧性角膜周边变性. 其表现是在角膜周边前弹力层及基质层内
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Isochrones：等时性环
等时的 isochronal;isochronic | 等时性环 isochrones | 等时性 isochronism
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phalloidin：鬼笔(毒)环肽
通指一类物质,它们多数来自毒蕈,如毒捕蝇蕈(Amanita phalloides)的鬼笔溶血(毒)环肽(phallin)、(类)鬼笔(毒)环肽(phallacidin)和鬼笔(毒)环肽(phalloidin)等,其他的有(类)鬼笔毒素(phallisin)、白蕈毒等.
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destabilising：使(政府、经济等)不稳定的,破环的
risk-free venture 无风险商业活动,无风险投资 | destabilising 使(政府、经济等)不稳定的,破环的 | Exxon 埃克森石油公司(美国)
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knot; loop：(用绳子等结成的环状物)
4.(拴牲口的挽绳) harness; traces | 5.(用绳子等结成的环状物) knot; loop | 6.(应酬的话; 陈陈相因的办法) convention; formula