杂环卡宾已经成为有机金属和无机配位化学中广泛应用的配体。
N-Heterocyclic carbenes have become universal ligands in organometallic and inorganic coordination chemistry.
杂环卡宾的反应性能较高,它们与周期表中几乎所有的元素都能发生反应。
Because N-heterocyclic carbene has very high activity of reaction, it can react with all elements in periodical table.
杂环卡宾金属络合物对许多反应有催化作用,它们是一类有潜在应用价值的催化剂。
N-heterocyclic carbene metal complexes have catalytic activities for many organic reactions, and they are a type of catalyst with potential value.
现在很多存储卡都跟钥匙差不多大,可以挂在钥匙环上,项链上,或放在钱包里。
Many thumb drives are no larger than a key and can be placed on keyrings, necklaces, or in a wallet.
"新华·银联中国银行卡消费信心指数"显示,6月份该指数为86.30,环比小幅下探0.09。
The Bankcard Consumer Confidence Index slid to 86.30 in June, down 0.09 points from May.
李奥纳多·迪卡·皮欧驾着丰田prius——油电混合车的形象,已俨然成为近十年环保主义的黄金标准。
For a decade now, the image of Leonardo DiCaprio cruising in his hybrid Toyota Prius has defined the gold standard for environmentalism.
在美国,三家主要的征信机构(Equifax,环联,百利)允许消费者通过网站退订相关的信用卡优惠宣传材料。
In the United States, the three major us credit bureaus (Equifax, TransUnion and Experian) allow consumers to opt out from related credit card solicitation offers via its opt out Pre Screen program.
目的:观察局部应用氨甲环酸及阿米卡星预防扁桃体切除术后出血的效果。
AIM: to observe the effect of topical application of tranexamic acid and amikacin in preventing hemorrhage after tonsillectomy.
钻头规是种周长一定的环型物,它卡紧在钻头的周围,去检测和测量钻头是否磨损,即在钻井过程中是否减少了周长。
Bit gauges, rings of defined circumference, are slipped around drill bits to detect and measure wear, which reduces the circumference of the bit during drilling.
据美国有线电视新闻网报道,美国信用报告机构“环联”报告称,今年第2季度美国人欠付的信用卡债务下跌至8年以来的最低水平。
According to credit bureau TransUnion, the amount of credit card debt US consumers are carrying dropped to an 8-year low in the 2nd quarter, CNN reported.
然后用内撑的方式夹持一环形件,开动机床,车削卡爪的内圆部份和端面。
The inner part of the clamping claw and the end face of the clamping claw are used for holding an annular part in an inner support.
机械卡钻可能由井眼内的碎屑、井眼内几何形状异常、水泥、键槽或者岩屑在环空中的积聚等引起。
Mechanical sticking can be caused by junk in the hole, wellbore geometry anomalies, cement, keyseats or a buildup of cuttings in the annulus.
用密度泛函B3LYP方法研究了过渡金属钐类卡宾与乙烯的环丙烷化反应的机理。
The cyclopropanation reaction of ethylene with samarium (II) carbenoid was studied by means of the B3LYP hybrid density functional method.
托卡马克装置产生等离子体击穿的条件是在真空室区域中达到足够大的环电压以及尽可能大的零场区。
The condition that plasma breakdown on Tokmak is get enough high loop voltage and large null field region in the vacuum vessel area.
同时,也会造成内燃机过热、活塞(环)卡缸、熔着磨损以及活塞环断裂等事故。
Meanwhile, it causes engine overheat, blockage piston (ring) in the cylinder, melting to wear and damage piston ring.
对原有的托卡马克平衡编码SWEQU进行了改进,使之适用于小环径比球形环装置的磁流体研究。
Tokamak equilibrium code SWEQU has been modified so that it can be used for the MHD equilibrium study of low aspect ratio device.
运用庞卡莱—班狄克逊环域理论,得到了极限环存在的充分条件;
The sufficient condition for the existence of limit cycle is proved using the Pioncare-Bendixson theory.
比赛的痕迹:图中为一自行车选手的影子倒映在路上,这是在91届环法自行车赛,位于卡尔卡松市与尼姆市之间的第14赛段。
Tour shadows: Picture shows the shadow of a cyclist on the road during the 14th stage of the 91st Tour DE France cycling race between Carcassonne and Nimes.
介绍了SUNIST低环径比托卡马克的纵向场线圈、欧姆加热场线圈和平衡场线圈的电学参数。
The electric parameters of toroidal magnetic field coils, ohmic heating systems and vertical balance magnetic field coils of SUNIST low aseptic ratio tokamak were introduced.
本文通过给大鼠高蛋白质食物,皮下注射醋酸考的松及其饮水中加入四环素的方法,建立了卡氏肺孢子虫大鼠模型。
Rat models of Pneumocystis carinii pneumonia were induced by feeding on high protein diet, injecting cortisone acetate subcutaneously and drinking the water added tetracycline.
低环径比托卡马克装置的实验和理论结果已证实它有利于改善MHD稳定性。
The results of the experiment and theory from low-aspect ratio tokamak devices have proved that the MHD stability will be improved.
来看自行车赛,大不列颠的马克·卡文迪什在环法自行车赛的于布列塔尼举行的第五站上取得了胜利。 这也是发生许多意外事件的一天。
Cycling, Great Brit's Mark Cavendish claimed victory on the fifth stage of the Tour de France on a day of thrills and spills in Britanny.
同时,PMAC运动控制卡提供了开放性的底层伺服环控制算法,这给今后的控制算法研究改进预留了方便的软硬件接口。
Meanwhile, PMAC's open servo algorithm property provides a convenience software and hardware interface for the improvement of the control algorithm in future.
如果卡瓦未能固定工具组合,则爪环将会防止整个工具组合落井。
If the slips fail to hold the tool assembly, the dog collar will prevent the entire assembly form dropping through and being lost in the wellbore.
用半经验am 1方法研究了C _(60)与单态二氯卡宾环加成反应的反应机理。
The cycloaddition reaction of dichlorocarbene with C60 has been studied by using the semi-empirical method AM1. A reasonable mechanism of the reaction has been suggested.
护环是发电机的重要设备,用来卡紧线圈端部,克服离心力的影响。
The retaining ring is a main equipment of the power generator, it is used to tighten the end of the loop, and overcome the influence of the centrifugal force.
为了研究小环径比托卡马克中粒子运动不同于大环径比的特点,探讨了标准模型磁场下单粒子在小环径比托卡马克中的运动,通过对环径比量级的假设采用漂移近似得到了保留至高阶项的导心运动方程。
The motion of particles in a low aspect ratio tokamak was investigated using the drift approximation, with a standard model for the magnetic field and the assumption of the order of aspect ratio.
目的观察吉西他滨联合卡培他滨治疗蒽环类耐药性晚期乳腺癌的疗效与毒性反应。
Objective To observe the results of gemcitabine combined with capecitabine on anthracycline-resistant breast cancer.
洗涤与安全紧密,以避免与其他服装抽丝“选项卡上的钩环。
Wash with hook-and-loop tab secured tightly to avoid snagging with other garments.
目的比较盐酸环喷托酯、复方托吡卡胺与阿托品对儿童验光中睫状肌麻痹的效果。
Objective to compare the effects of cyclopentolate hydrochloride, compound tropicamide and atropine on cycloplegia in children.
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