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gem
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  宝石
     The Study on Properties of K_2O—TiO_2—SiO_2—R_xO_y Glass—Gem
     K_2O—TiO_2—SiO_2—R_xO_y玻璃宝石性质研究
短句来源
     New Synthctic Gem“C-OX”
     新的合成宝石“C-OX”
短句来源
     A jadeite gem having visible emission (red, yellow, violet) has been synthesized by doping Eu_2O_3, Dy_2O_3, CeO_2 of 0.01-0.1 mol under high pressure and high temperature. Their emission spectra were determined.
     在具有翡翠成份的原料中掺入0.01~0.1mol的Eu_2O_3、Dy_2O_3、CeO_2,经商温高压合成,分别茯得可发红、黄、紫色可见荧光的翡翠宝石
短句来源
     Results The average dust concentration in natural and artificial gem processing workshops were 1.9mg/m~3 and 3.8mg/m~3,and the average free silicon contents of the gem dusts were 70.9% and 44.9%.
     结果天然宝石厂与人造宝石厂工作场所粉尘平均浓度分别为1.9mg/m3和3.8mg/m3,粉尘中游离SiO2平均含量分别为70.9%和44.9%;
短句来源
     The incidence of silicosis in 4 591 natural gem processing workers and 2 980 artificial gem processing workers were 3.0%(137/4 591) and 3.7%(111/2 980) with the average age of onset of being(30.0±5.5)and 30.6±4.1)years old,respectively.
     4 591名天然宝石厂与2 980名人造宝石厂作业工人中检出各期矽肺分别为137例和111例,检出率分别为3.0%和3.7%,平均发病年龄分别为(30.0±5.5)岁和(30.6±4.1)岁,差异无统计学意义;
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  瑰宝
     Folk Craft As A Gem of Chinese Traditional Culture
     民间工艺:中国传统文化的瑰宝
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     Wudang Golden Hall,the Gem of China Golden Halls
     中国金殿之瑰宝——武当金殿590年记
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     The art of Islamic architectural decoration is the gem in the civilized history of human beings' architecture, and a materialized symbol of Islamic civilization.
     伊斯兰建筑装饰艺术是人类建筑文明史上的瑰宝,是伊斯兰文明的物化象征标志,它以千姿百态的多样风格,广布世界各地的空间格局,成为地球村上一道不可忽视的风景线。
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     Chinese classical poetry is the gem of Chinese literature, particularly noted for its simplicity, subtleness and its rich connotation.
     中国古典诗词是中国文学的瑰宝,以含蓄、简约和微妙见长。 中国古典诗歌是建立在一系列具体、特定的细节描写上的。
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     Therefore, for Standard of Normal Nigh School Mathematics Curriculum (Experiment), the required courses have included the scope of algorithm, in the meantime subjects have been set to the required courses corresponding to Chinese Ancient Mathematical Gem andProcess of Algorithm Thoughts, etc.
     因此,《普通高中数学课程标准(实验)》在必修课程中设置算法内容的同时,还要求在数学课程的相关内容中也要渗透算法思想,运用算法解决问题,在选修课程中还设置了“中国古代数学瑰宝”和“算法思想的历程”等与算法相关的专题。
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  “gem”译为未确定词的双语例句
     GP group 26 patients received GEM1000mg/m~2,iv,d1,8,CBP300mg/m~2,iv,d1;
     GP组26例,GEM1000mg/m2,iv,d1,8,CBP300mg/m2,iv,d1;
短句来源
     THE EFFECT OF MACROPHAGE DEPLETION IN VIVO ON TUMOR-SUPPRESSIVE ACTIVITY OF GEM_(10), A NEW ORGANIC GERMANIUM COMPOUND
     THE EFFECT OF MACROPHAGE DEPLETION IN VIVO ON TUMOR-SUPPRESSIVE ACTIVITY OF GEM_(10),A NEW ORGANIC GERMANIUM COMPOUND
短句来源
     Results: Seven chemotherapeutic agents showed sensitive rate of OXA,MMC,DDP,GEM,EADM,5-FU,HCPT were 92.5%,88.88%,81.48%,66.66%,62.96%,51.85% and 40.74%,respectively.
     结果:7种化疗药物的敏感率为奥沙利铂(OXA)92.5%,丝裂霉素(MMC)88.88%,顺铂(DDP)81.48%,吉西他滨(GEM)66.66%,表阿霉素(EADM)62.96%,5-氟脲嘧啶(5-FU)51.85%,羟基喜树碱(HCPT)40.74%。
短句来源
     NG group 16 patients received NVB25mg/m~2,iv,d1,8,GEM1000mg/m~2,iv,d1,8.Effect was determed after two cycles treatment.
     NG组16例,NVB25mg/m2,iv,d1,8,GEM1000mg/m2,iv,d1,8.完成2周期治疗后评价疗效。
短句来源
     The liver metastatic rate in 3TSR,Gemcitabine (Gem) and 3TSR plus Gem groups was 66.7%,22.2%,44.4% and 11.1%,respectively.
     对照组、3TSR组、Gem组和3TSR+Gem组肝转移率分别为66.7%,22.2%,44.4%和11.1%;
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  gem
The structure of homopolymers of vinyl-gem-dichlorocyclopropanes
      
This review presents the results of research and development of GEM-based radiation detectors.
      
GEM-based detectors of ionizing radiations are considered.
      
A special Section is devoted to the development of GEM-based gas photodetectors.
      
The physicochemical (including luminescence) and catalytic properties of the complex in butadiene polymerization and 1,1-gem-dibromo-2-phenylcyclopropane dehalogenation were studied.
      
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Methyl silanes of the types (CH_3)_n SiCl_(4-n) and (CH_2)_m Si(CH_2C1)Cl_(3-m) have been photochemically chlorinated in the vapor phase. It was found that the structure of the dichlorinated silanes formed was greatly influenced by the presence of Si-Cl bond. Silanes with no Si-Cl bond behaved similarly as the hydrocarbons,i.e., the substitution of two Cl-atoms for hydrogen occurred on different C-atoms in preference to the same C-atom, while the presence of the Si-Cl bond made the reverse to be true, the gem...

Methyl silanes of the types (CH_3)_n SiCl_(4-n) and (CH_2)_m Si(CH_2C1)Cl_(3-m) have been photochemically chlorinated in the vapor phase. It was found that the structure of the dichlorinated silanes formed was greatly influenced by the presence of Si-Cl bond. Silanes with no Si-Cl bond behaved similarly as the hydrocarbons,i.e., the substitution of two Cl-atoms for hydrogen occurred on different C-atoms in preference to the same C-atom, while the presence of the Si-Cl bond made the reverse to be true, the gem dichloro-compound predominated.

作者将下列两类矽烷以及两种氯代异丁烷进行气相(光照)氯化,找出二氯取代的产物,其两个氯原子的相互位置和原来矽烷裹有无矽氯键有很大关系。 (CH_3)_nSiCl_(4-n) (CH_3)_mSi(CH_2Cl)Cl_(3-m) n=2,3,4 m=1,2,3 在没有矽氯键的矽烷,两个氯原子取代在不同甲基上的产物比较取代在同一甲基上的为多,这和碳化氢的取代相同。在具有矽氯键的矽烷,二个氯原子取代在同一甲基上的产物比较取代在不同甲基上的为多,这和碳化氢的取代不同。作者认为矽氯键之所以有这种影响是因为它一方面阻尼α-位甲基氯化,另一方面还促进α-位氯甲基的继续氯化。

(i)Using 146 cepheids selected from the data listed by Kraft and Schmidt,the variation of Δω(R) with R is computed by means of Camm's method.Then,the re- sult is fitted to the curve of Δω(R) computed from the observational data of 21 cm emission of neutral hydrogen,obtained at Leiden.The value of R_0,the sun's distance from the galactic centre,is found to be 11.0 kpc. (ii)Using the proper motions of 17 cepheids (omitting W Gem) given by Blaauw and Morgan,the angular velocity of rotation ω(R_0) for the...

(i)Using 146 cepheids selected from the data listed by Kraft and Schmidt,the variation of Δω(R) with R is computed by means of Camm's method.Then,the re- sult is fitted to the curve of Δω(R) computed from the observational data of 21 cm emission of neutral hydrogen,obtained at Leiden.The value of R_0,the sun's distance from the galactic centre,is found to be 11.0 kpc. (ii)Using the proper motions of 17 cepheids (omitting W Gem) given by Blaauw and Morgan,the angular velocity of rotation ω(R_0) for the solar neighbourhood is com- puted.The resulting value is 23 km/sec/kpc.Therefore the linear rotational velocity V(R_0) is 250 km/sec. (iii)Making use of the curve of Δω(R),values of ω(R),V(R),F(R),A(R),and B(R) are calculated in the region from 5 to 14 kpc from the galactic centre.Lastly,a comparison is made between the values of V(R) computed and the results obtained from the dynamical theory of stable stellar systems.

(i)利用克拉夫特和施密特列出的造父变星资料中146个星的资料,用加姆方法计算了Δω(R)随 R 的变化.结果同根据莱顿天文台得到的21厘米氢线发射的观测资料计算出的Δω(R)镶合,定出太阳离银心的距离 R_0=11.0千秒差距.(ii)利用伯劳乌和摩根给出的17个造父变星(W Gem 除外)的自行资料,算得太阳邻近的银河系自转角速度ω(R_0)=23公里/秒/千秒差距,因而得自转速度 V(R_0)=250公里/秒.(iii)利用Δω(R)曲线计算了在R=5至14千秒差距区域内,ω(R)、V(R)、F(R)、A(R)和 B(R)的数值.最后,将 V(R)的数值同稳定星系动力学理论的结果作了比较.

Product distribution of C6 and C7 alkanes reacted on Pt/SiO2, Pt/Al2O3 catalysts was examined in detail by the gas chromatography with continuous flow and pulse techniques and mass spectronietric analysis. The skeletal isomerization to the formation of gem isomers was found to take place definitely under mild reaction condition and this was consistent neither with the bond shift nor with cyclic mechanism. A new mechanism involving a "cyclopropanoid" intermediate which gives satisfactory explanations for...

Product distribution of C6 and C7 alkanes reacted on Pt/SiO2, Pt/Al2O3 catalysts was examined in detail by the gas chromatography with continuous flow and pulse techniques and mass spectronietric analysis. The skeletal isomerization to the formation of gem isomers was found to take place definitely under mild reaction condition and this was consistent neither with the bond shift nor with cyclic mechanism. A new mechanism involving a "cyclopropanoid" intermediate which gives satisfactory explanations for the main distribution pattern of reaction products as well as for the formation of gem isomers is proposed. According to the "cyclopropanoid" mechanism, the dehydrogenative adsorption of parent alkane molecules at α,γ position and formation of a trimethylene adsorbed state were considered as the precursory step for the rearrangement of carbon skeleton.It was further assumed that surface reaction of rearrangement of trimethylene adsorbed state was resemble in nature with the chemistry of insertion reaction of metallocyclobutane. With this assumption, the relative easiness of formation of various isomers from C6 and C7 alkanes was predicted to be parallel with the relative stability of the corresponding substituted metal lo-cyclobutanes. The distribution of isomerization products was in good accordance with the prediction. The orbital interaction of the trimethylene adsorbed state and its symmetry behavior in rearrangement reaction were discussed to provide some theoretical confidences for the conceptions concerned with the new mechanism.

应用微型反应-色谱技术(稳态流动技术及脉冲技术)研究了C_6和C_7异构化反应产物分布的特点,提出了烷烃在铂催化剂上异构化反应的类三元环新机理,它能很好地说明产物分布,特别是关于季碳异构体的生成。根据类三元环机理,烃分子首先在间位碳原子上各脱掉一个H原子,形成同铂原子以a,γ相连的三次甲基吸附态,它近似于铂环丁烷,异构化反应是由于铂环丁烷重排。可以按铂环丁烷的取代基位置与稳定性的关系对各种三次甲基吸附态的生成难易作比较,推测异构产物分布。实验结果与预测结果相符合。为了说明类三元环机理的理论合理性,对三次甲基吸附态的轨道相互作用和重排反应的对称性进行了初步讨论。

 
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