取代剂

"About 30 to 40 million CT scans are performed each year and about 30% of them are done for abdominal conditions," he noted. Using milk instead of oLumen would sae a tremendous amount of money.

他注意到：每年进行CT检查的病例介于三千万到四千万之间，其中30%的是腹部疾病进行的检查，采用牛奶作为阳性对比剂取代oLumen可以节省大量的资金。

"About 30 to 40 million CT scans are performed each year and about 30% of them are done for abdominal conditions," he noted. Using milk instead of VoLumen would save a tremendous amount of money.

他注意到：每年进行CT检查的病例介于三千万到四千万之间，其中30%的是腹部疾病进行的检查，采用牛奶作为阳性对比剂取代VoLumen可以节省大量的资金。

The extracting ability of substituted monoamide can be highly influenced by its structure, especially when it extracts te-travalent actinides.

取代单酰胺的萃取能力受结构的影响很大，尤其对 4价锕系元素，可以设计不同结构的酰胺来萃取分离4价和 6价锕系金属，国内外在该类萃取剂的性能研究方面做了大量工作。

The characteristics of non-azide compositions including high nitrogen compounds such as tetrazoles,guanidine,improved thermites,oxidants,binders and process assistants are discussed.Because of their advantages such as adjustable burning rate,nontoxicity and high gas yield,non-azide gas generant to replace azide gas generant will put into use widely.

对出现的四唑类、胍类、铝热剂类等非叠氮配方的高氮化合物燃料、氧化剂、黏合剂、工艺助剂等特点和发展做了总结和讨论，指出非叠氮高氮化合物有无毒、燃速范围宽、产气量大、燃温低等优点，正在取代叠氮配方燃气发生剂，得到广泛应用。

The experimental results indicate that the monoamide with methyl as the alkyl has a high solubility in water, can be used as the complexing stripping-agent, and discomposes completely at 250 C.

研究发现取代烷基为甲基的单酰胺产品，水溶性大，可作为锕系元素水相络合反萃剂，并且废反萃剂加热到250 C就可以完成分解。

An oxidative halogenation process involving contacting a reactant hydrocarbon selected from methane, a halogenated C1 hydrocarbon, or a mixture thereof with a source of halogen and, preferably, a source of oxygen in the presence of a rare earth halide or rare earth oxyhalide catalyst, so as to form a halogenated C1 hydrocarbon having a greater number of halogen substituents as compared with the reactant hydrocarbon.

一种氧化卤化方法，包括使一种选自甲烷、卤代C1烃、或其混合物的反应剂烃与卤素源和优选的氧源，在稀土卤化物或稀土卤氧化物催化剂存在下，进行接触，从而形成一种卤代C1烃产物，它较所述反应剂烃具有更多数目的卤素取代基。

On September 6, 2005, the US Food and Drug Administration licensed the combination tetravalent MMRV vaccine for use in children aged 12 months to 12 years. To prevent measles, mumps, rubella, and varicella, MMRV vaccine can be used instead of trivalent MMR vaccine and monovalent varicella vaccine. To fulfill the recommended 2-dose vaccine policies, the first dose is recommended at age 12 to 15 months and the second at age 4 to 6 years.

2005年9月6日，美国食品药物管理局核准四合一的MMRV混合疫苗用於12个月至12岁的小孩；为了预防麻疹、腮腺炎、德国麻疹、水痘，MMRV疫苗用於取代三合一的MMR治疗加上水痘疫苗；为了符合建议施打两次的疫苗政策，第一剂建议在12至15个月大，第二剂在4至6岁。

On September 6, 2005, the US Food and Drug Administration licensed the combination tetravalent MMRV vaccine for use in children aged 12 months to 12 years. To prevent measles, mumps, rubella, and varicella, MMRV vaccine can be used instead of trivalent MMR vaccine and monovalent varicella vaccine. To fulfill the recommended 2-dose vaccine policies, the first dose is recommended at age 12 to 15 months and the second at age 4 to 6 years.

2005年9月6日，美国食品药物管理局核准四合一的MMRV混合疫苗用于12个月至12岁的小孩；为了预防麻疹、腮腺炎、德国麻疹、水痘，MMRV疫苗用于取代三合一的MMR治疗加上水痘疫苗；为了符合建议施打两次的疫苗政策，第一剂建议在12至15个月大，第二剂在4至6岁。

The inhibition action of chitosan quaternary ammonium was studied for carbon steel in sulfuric acid.

研究了壳聚糖季铵盐作为单组分缓蚀剂对碳钢在硫酸溶液中的缓蚀性能，以及缓蚀剂浓度、温度、时间和特性粘度、取代度等因素对缓蚀效果影响。

Many expert French polishers will add additional body coats after the final leveling and then use a liquid abrasive/polishing compound in place of using the glaze coat method that we use.

很多专业涂漆师会在最终磨平后再建立一点漆的厚度，然后用液体研磨剂/上光剂来上光而取代我们这里的抛光步骤。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。