查询词典 in the presence of

Benzyl butyrate was prepared by phase transfer catalysis of butyric acid with benzyl chloride in the presence of ben zalkonium bromide as a catalyst.

以丁酸和氯化苄为原料，以新洁而灭为相转移催化剂合成了丁酸苄酯。

Other trade events in London will include a visit to the London Outsource World exhibition and a networking event organized by the Slough Borough Council inviting the leading ICT companies. The Pakistan-Britain Trade Investment Forum has also organized a networking event and reception at Asia House, London, in the presence of Dr. Maliha Lodhi to facilitate networking of Pakistani and British IT companies.

其他贸易活动，在伦敦将包括访问伦敦外包世界展览会和一个网络组织的活动，由蜕自治区议会邀请领先的信息和通信技术公司在巴基斯坦的英国贸易投资论坛还举办了一次交流活动和酒会，亚洲之家，伦敦，在在场的博士Maliha Lodhi ，以方便网络的巴基斯坦和英国的资讯科技公司。

In the presence of relatives and invited guests, the father conferred on his son a special name and a square cornered cap as distinguishing marks of his mature manhood.

在场的亲属和特邀嘉宾，父亲授予他的儿子一个特别的名字和一个广场三角帽作为识别标志的成熟的男子汉气概。

In the presence of relatives and invited guests, the father conferred on his son a special name and a square cornered cap as distinguishing marks of his mature manhood.

在在场的亲人，并邀请客人，父亲授予他的儿子一个特别的名字和一个广场一隅帽作为识别标志，他成熟的男子气概。

Therefore, the nickel impurity in the chromium-plating bath was determined using spectrophotometry, which was based on the reaction between nickel ions and diacetyldioxime, generating a red complex, in the presence of alkali and ammonium per-sulfate. The measurement was carried out in 3cm color-matching cells at a wavelength of 510nm, using the sample without chromogenic agent as the reference.

在碱性和过硫酸铵存在的条件下，镍离子与丁二酮肟生成水红色配合物，利用这一特性，以丁二酮肟光度法测定镀铬溶液中镍杂质的含量，以不加显色剂的试样作参比液，用3cm比色皿，在波长510nm处测定。

Transesterification of Jatropha curcas oil was carried out in the presence of solid acid, the effects of types of catalysts and reaction conditions on the bio-diesel yields and the components in the process of the preparation of methyl esters were examined.

采用固体酸催化酯交换方法，研究了由麻疯树油制备脂肪酸甲酯过程中催化剂类型及工艺条件对生物柴油产率和产品组成的影响。

The atmospheric corrosion of MB8 magnesium alloy deposited with NH4Cl and in the presence of SO2(25℃and 85%±5% RH) was studied by gravimetry, focus ion beam, Fourier transform infrared spectroscope and X-ray diffraction.

目的 通过研究NH4Cl和SO2对MB8镁合金大气腐蚀行为的影响，揭示大气环境污染因素对MB8镁合金腐蚀的影响规律。

The atmospheric corrosion of MB8 magnesium alloy deposited with NH4Cl and in the presence of SO2(25 ℃and 85 %±5 % RH) was studied by gravi metry,focus ion beam,Fourier transform infrared spectroscope and X-ray diffraction.

目的通过研究 NH4Cl 和SO2对MB8镁合金大气腐蚀行为的影响，揭示大气环境污染因素对MB8镁合金腐蚀的影响规律。

Direct sky blue was treated with amplified sunlight radiation in the presence of hydrogen peroxide.

在H2O2存在条件下，对直接湖蓝染料进行强化日光辐照处理。

Dihydropyrimidin-2 (1H)-ones were synthesized by condensation of aromatic or aliphatic aldehydes, urea and ethyl acetoacetate or acetylacetone one-pot three-component Biginelli condensation in the presence of room temperature ionic liquids as catalysts under solvent-free conditions.

5利用室温离子液体作催化剂，芳香或脂肪醛、尿素和乙酰乙酸乙酯或乙酰丙酮三组分缩合制备3，4-二氢嘧啶-2-酮衍生物。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷