presence的例句大全

On the Capacity of the Copper Twisted Pairs in the Presence of AWGN and FEXT

AWGN和FEXT噪声下铜双绞传输线的信道容量

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Due to the presence of carbonyl compound emissions in higher concentration for engines fueled with methanol/ ethanol-diesel blends, this study focuses on the emission characteristics and formation mechanism of carbonyl compounds ( CBCs) in diesel engine fueled with alcohols-diesel blends.

针对醇类燃料羰基类化合物排放量较高的问题，本文开展了柴油机燃用醇类/柴油混合燃料羰基化合物的排放特性和生成机理的研究。

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In the presence of the flow deflector, the generating of the vortices and the separating of the shear layer are avoided thereby the energy loss of the jet nozzle is reduced considerably.

由于喷头中有了导流体，避免了涡流的产生与剪切层的分离，从而大幅度地减少了喷头的能量损失。

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Noise and laughter announced the presence of the guests.

喧笑声说明有客人在.

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The presence of Pb2+ can be embedded in the DNA enzyme catalyzed substrate hydrolysis chain of RNA bases, and it was cut into two parts.

Pb2+存在时，能够催化嵌入在该DNA酶底物链中RNA碱基的水解，使其被剪切为两部分。

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Methods The condensation of 2-bromo-5,6-dimethoxy-indan-1-one with various aminoalkyl phenols in the presence of ( K_ ( 2) CO_ ( 3)) and acetonitrile gave the corresponding title compounds, and the in vitro AchE and BchE inhibitory activities were evaluated by the modified Ellman method.

方法在K2CO3和乙腈存在下，将2-溴-5,6-二甲氧基-1-茚酮与多种胺烷基苯酚缩合得到一系列苯氧茚酮类衍生物，并采用改进的Ellman方法研究它们的体外AchE和BchE抑制活性。

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Reactions are generally faster in DCE than in THF, and in both solvents, reactions are faster in the presence of AcOH.

以DCE为溶剂，反应速度比在以THF为溶剂快，如果有醋酸作为催化剂，反应速度会提高许多。

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Anionic monofunctional polymerization and difunctional Polymerization of HFPO with perfluorinated acyl fluoride in presence of potassium fluoride have been studied.

研究了氟化钾催化下全氟环氧丙烷的自聚以及与全氟戊（或己）二酰氟的双官能团阴离子聚合。

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Recent studies had indicated the presence of antibiotics in municipal wastewater effluent and surface water.

最近研究显示在城市废水和表面水中检测到了抗生素的存在。

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The new UAB study finds this cross-talk can only happen in the presence of interleukin-21, a powerful immune system protein.

州立大学的新研究发现这种协同作用机制只在白细胞介素21（一个强大的免疫系统蛋白）存在的情况下发挥作用。

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Alibaba's Russian unit AliExpress mostly sells goods imported from China and hasn't had to worry about competition from Amazon.com Inc. because the U.S. behemoth has little presence in the country.

阿里巴巴旗下的俄罗斯子公司全球速卖通主要销售从中国进口的商品，而且不必担心来自亚马逊的竞争，因为亚马逊作为美国商业巨头在俄罗斯并没什么市场。

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Objective To determine the presence, distribution, and metastasis incidence of parametrial lymph nodes ( PLN) of patients with cervical cancer and to investigate the role of lymphatic mapping and topographic section in PLN identification.

目的探讨早期子宫颈癌患者宫旁淋巴结（PLN）存在与否及其分布、转移规律，进而评估以生物染料法（亚甲蓝染色）结合标本的局部解剖识别PLN的临床价值。

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A PFG NMR experiment for diffusion in solid samples in the presence of eddy currents

固态样品中扩散的核磁共振测量

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A novel nonlinear adaptive control method is presented for a near-space hypersonic vehicle ( NHV) in the presence of strong uncertainties and disturbances.

针对存在强烈不确定和干扰的近空间高超声速飞行器（NHV），提出了一种新的非线性自适应控制方法。

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A kinetic spectrophotometry for determining trace vanadium in environment has been established, which is based on the catalytic effect of vanadium on the oxidation of o ─ phenlonediamine with potassium bromate in the presence of activator pyrocatechol in KHP ─ HCl buffer solution.

基于V（v）在KHP&HCl缓冲溶液中，邻苯二酚活化剂存在下，对溴酸钾氧化邻苯二胺的催化作用，建立了一个测定环境样品中痕量机的催化动力学光度法。

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But HSBC is also committed to expanding its presence in emerging markets, and KEB, South Korea's sixth-largest bank, does the job.

但是汇丰同样专注于提升在新兴市场中的知名度。而韩外换银行，作为韩国第六大银行，恰恰可以很好地充当这一载体。

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There is no doubt that both the mean and standard deviation are effected by the presence of outliers, while the median and IQR are much less impacted.

几乎不用怀疑平均值和标准偏差会收到异常值存在的影响，而中间值和IQR所受到的影响则较小。

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Reactive pyrolysis gas chromatography ( Py-GC) in the presence of an organic alkali, tetramethylammonium hydroxide(( CH3) 4NOH, TMAH), was applied to the compositional analysis of natural resin shellac.

研究了有机碱试剂，氢氧化四甲铵（tetramethylammonium hydroxide TMAH）共存下的反应热裂解气相色谱（Py-GC）应用于天然树脂紫胶的化学组成分析。

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Electrochemical Behavior of Hemoglobin at Bare Silver Electrode in the Presence of Tetramethylammonium Chloride and Its Application

在四甲基氯化铵促进下血红蛋白在裸银电极上的电化学行为及分析应用

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In the presence of the phase transfer catalysts such as tetramethylammonium bromide, tetraethylammonium bromide or polyethylene glycol ( MW 400 and 6,000), lithium hydroxide is the best alkali among lithium hydroxide, sodium hydroxide and potassium hydroxide.

研究表明在溴化四甲基铵、溴化四乙基铵、聚乙二醇（分子量为6000）和聚乙二醇（分子量为400）相转移催化体系中，氢氧化锂最好，氢氧化钾次之，氢氧化钠最次。

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