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first area
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  “first area”译为未确定词的双语例句
     the area of energy concentration(Fl,F2,F3), the first area of energy concentration band width (B1) of consonants /s/,/sh/,/j/; the locus of /t/,/l/.
     辅音/s/、/sh/、/j/强频区(F1、F2、F3)及第一强频区带宽(B1),/t/、/l/的音轨点的数据。
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     There was significant differences (P<0.05) in the area of energy concentration (F1,F2)and the first area of energy concentration band width (B1) in consonant /s/ of the groups before restoration ,at the beginning and one week.
     辅音/s/第一、第二强频区(F1、F2)及第一强频区带宽(B1)在义齿初戴时与初戴前、初戴一周时相比,有统计学差异(P<0.05)。
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     The F1 fault belt is the first area for the geothermal groundwater exploration, the second is the area confined by F1 , F41 and HF3. This conclusion has been proved by the exploration.
     北部、北西部,F1断层带、F41断层带、滑动构造(HF3)分布区均是温热水赋存的有利地段.
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     Mixing Low Temperature Water Gathering-Transferring Process Flow in South First Area Daqing Oilfield
     大庆油田南一区掺低温水集输流程
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     (2) When participants employed directive strategy, the percent of the number of first fixation in the first area of interest was less than 58.3%, and when serial strategy was employed, the percent was more than 58.3%;
     (2)被试采用导向式搜索策略时,被试在第一个感兴趣区域首注视点百分比小于58. 3%,在视觉搜索过程中的注视点数量明显较小、扫视轨迹长度和注视时间明显较少;
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  first area
In the first area electrical diphasic responses are most commonly recorded, the first phase being positive.
      
The first area concerns the biological substrates of empathy.
      
The first area is initiation of drinking, when drinking decisions are presumed to be motivated by alcohol expectancies.
      
The first area of investigation relates specifically to bankruptcy policy.
      
The first area concerns the development of technologies to release macromolecules continuously from solid polymers.
      
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Chemiluminescence occurs when the exothermicity (ΔG) of a chemical reaction is converted into electronic excitation energy of a reaction product, which then emits photons of light (hv). We can describe chem.ilum.i-nescence as a sequence. The heart of the sequence is the chemi-excitation step.The field of chemiluminescence has experienced tremendous growth and witnessed significant advances in the past more ten years. To a large extent, the recent progress toward the understanding of chemiluminescent processes...

Chemiluminescence occurs when the exothermicity (ΔG) of a chemical reaction is converted into electronic excitation energy of a reaction product, which then emits photons of light (hv). We can describe chem.ilum.i-nescence as a sequence. The heart of the sequence is the chemi-excitation step.The field of chemiluminescence has experienced tremendous growth and witnessed significant advances in the past more ten years. To a large extent, the recent progress toward the understanding of chemiluminescent processes can be attributed to achievements in three general areas. The first area of achievement was the discovery and subsequent intensive investigation of the chemiluminescent reaction of 1,2-dioxetanes. The discovery of this reaction, a simple unimolecular rearrangement, has allowed experimentalists to focus on the study of the key step of chemiexcitation. A second area of recent advance has come in the field of electron-transfer chemiluminescence. Electron-transfer chemiluminescence has been investigated extensively as elctro-generated chemiluminescence (ECL). Using ECL technique significant progreas has been made in recent years toward the understanding of chemiexcitation by electron transfer. A third general area of recent progress has been the confirmation of chemically initated electron-exchange luminescence(CIEEL) as a general mechanism for the general chemical formation of light.In this review we have introduced the classification of chemiluminescent organic reactions, examined the general requirements for a reaction to be chemiluminescent, presented the three important generalized mechanisms of chemiluminescence in solution, and finally enumerated some important chemiluminescent systems.In terms of potential-energy surfaces, we recognize two major classes of chemiluminescent organic reactions: ( 1 ) nonadiabatic chemiluminescence, and ( 2 ) adiabatic chemiluminescence. A classification by reaction type has: oxidation, electron transfer, fragmentation, and pericylic rearrangement.Certainly, the most stringent requirement for efficient chemiexcitation is one of energetics, ΔG + ΔG≥ΔE + ΔE' (1)where +++E is the energy of the excited state, ΔE' is a geometry factor. It is clear that spin-orbit coupling factors could play a significant role in determining the efficiency of triplet-state generation (e.g. for the chemilumi-nescence thermolysis of 1,2-dioxetanes).Up to now, three general mechanism have been proposed to explain the chemiluminescence of organic compounds. In the first mechanism, a high-energy reactant molecule undergoes an exergonic reaction, typically a rearrangement or fragmentation, to generate a product molecule in an electronically excited state (scheme 1 ). The second general mechanism for chemical light formation is radical ion annihilation (scheme 2). The third generalized mechanism, for chemiluminescence of organic molecules in solution has been identified recently as chemically initiated electron-exchange luminescence (CIEEL)(scheme 3).Some important chemiluminescent systems are:peroxyoxalates,dioxetanes, dioxetanones, diphenol peroxides, a cyclic secondary peroxyesters and Iu minol. Recently in peroxyoxalates, we have found a new method for preparing aryl peroxyoxalates. The reaction is as follow:2ArOH+(COOH)2+POCl3→(COOAr)2 +HPO3+3HC1 (2).

在过去十多年里,有关有机化合物化学发光的研究增长很快,在三个方面取得了新进展:(1)1,2-二氧杂丁烷体系化学发光的发现和研究,有助于人们了解单分子化学激发作用;(2)开展了电子转移化学发光的研究,用电生化学发光技术,研究电子转移的化学激发过程;(3)确认了化学引发电子变换发光(CIEEL)为一般化学发光机理。 本文将介绍化学发光有机反应的分类,说明化学发光的一般要求,叙述三个化学发光机理以及列出一些重要的化学发光体系。 在过氧化草酸芳酯体系中,我们提出了一种合成草酸芳酯的新方法,其反应如下: 2ArOH+(COOH)_2+POCl_3→(COOAr)_2+HPO_3+3HCl

Mosandrite occurs in argirine-nepheline syenite of Saima, Liaoning province. it is light yellow to yellow in colour, aud tabular or long columnar in crystal form. Specific gravity 3.23-3.303 hardness 4-5. Biaxial positive with 2V=80°, Ng=1.661, Nm=1.653, and Np=1.651. Isotropism is observed at the center of this mineral. Chemical formula of the crystalline sample is (Na_(0.37)K_(0.24)H_3O_(0.15))_(0.76) (Ca_(3.15)Na_(0.72)Sr_(0.07)Fe_(0.03)Nb_(0.03))_4 (Ce_(0.)La_(0.22)Nd_(0.16)Pr_(0.05)Sm_(0.02)Y_(0.05)U_(0.01)Th_(0.04))_(0.95)...

Mosandrite occurs in argirine-nepheline syenite of Saima, Liaoning province. it is light yellow to yellow in colour, aud tabular or long columnar in crystal form. Specific gravity 3.23-3.303 hardness 4-5. Biaxial positive with 2V=80°, Ng=1.661, Nm=1.653, and Np=1.651. Isotropism is observed at the center of this mineral. Chemical formula of the crystalline sample is (Na_(0.37)K_(0.24)H_3O_(0.15))_(0.76) (Ca_(3.15)Na_(0.72)Sr_(0.07)Fe_(0.03)Nb_(0.03))_4 (Ce_(0.)La_(0.22)Nd_(0.16)Pr_(0.05)Sm_(0.02)Y_(0.05)U_(0.01)Th_(0.04))_(0.95) “Ti_(1.13)[(Si_(3.18)Al_(0.19))_4O_(14)][F_(2.01)(OH)_(1.99)]_4. The cell dimensions measured by X-ray powder diffraction are a_0=18.46, b_0=5.66, c_0=7.34, α=89.5°,β=90.5°,γ=89.8°,Z=2, belonging to monoclinic or pseudo-orthorhombic system with the crystal structure being layered Ti-silicate. The structure of mosandrite is similar to that of 2M type muscovite. In mosandrite, Na~+ and Ce~(3+) cations link '2:1' unit layers which are composed of one Ca-O octahedral layer and two anion layers made up of Ti-O polyhedronand Si-O tetrahedron pairs.The main infrared absorption spectra of mosandrite are 3550, 3380, 1630, 1040, 960, 845, 649 and 478cm~(-1). Its Raman spectrum might be divided into three areas, with 310, 250, 200cm~(-1) peaks in the first area, 800, 660, 600cm~(-1) peaks in the second, and 1160, 1070cm~(-1) peaks in the third. There exists only one exothermic peak (600℃) on the differential thermal curve, resulting from partial crystallization of the non-crystalline mosandrite.

层硅铈钛矿是一种罕见又多变的矿物,因而至今未见详细报导。笔者在赛马碱性岩体的铀、钍、铌、稀土巨型综合矿床中获得了各种成因的新鲜矿样,作了系统的研究,指出该矿物为单斜晶系、具类似2M型白云母结构的层状钛硅酸盐。

At the beginning of 1980s,the Bureau of Geology and Mineral Resources of Xizang started its geological reconnaissance for tin deposits,whioh led to the discovery of some economic primary tin deposits and tin placer deposits; in addition,a series of tin deposits discovered in western Sichuan and western Yunnan have approximately the same geological conditions as those in eastern Tibet.The authors' purpose of writing this paper is to put forward their view- points concerning tin potential in eastern Tibet. Several...

At the beginning of 1980s,the Bureau of Geology and Mineral Resources of Xizang started its geological reconnaissance for tin deposits,whioh led to the discovery of some economic primary tin deposits and tin placer deposits; in addition,a series of tin deposits discovered in western Sichuan and western Yunnan have approximately the same geological conditions as those in eastern Tibet.The authors' purpose of writing this paper is to put forward their view- points concerning tin potential in eastern Tibet. Several tin prospects can be recognized in Eastern Tibet on the basis of metallogenic conditions for tin deposits: 1.Two ore prospect areas The first area stretches southward from Riwoge county through Zogong,connected probably with the Lancangjiang tin and tungsten belt in Yunnan province.A rich primary tin deposit of strata- bound tin-bearing quartz veinlet type which extends at least hundrds of meters at surface has been discovered in Riwoge area.A tin deposit of the same type has been found in Yulong of Yunnan province,and placer deposits has also been detected along the belt.The tin mineralization in this area is surely related to the late Yanshanian“S”type granite.The second belt refers to the placer tin belt from Bangkog,through Lhari,Bowo to Zayu.A rich placer with associated tungsten and gold mineralizations adjacent to the Late Yansha- nian“S”type granite period has been found in Bangkog area,intense greiseniza- tion is observed,and heavy mineral samples collected at surface contain cassi- terite as high as 3000g/m~3. 2.Three favorable areas for prospecting(1)The area located on the western side of the Jinshajiang River.These skarn tin-polymetallic ore deposits have been discovered near eastern side of the Jinshajiang River in Sichuan while a series of skarn polymetallic ore deposits have been detected on the western side of the Jinshajiang River.From the similar geologic conditions of these two sides,it can be inferred that tin deposis might be found on the western side of the Jinshajiang River.(2)The northern slope of the Himalayan mountains,where there exist a series of“S”type granites of Himalayan period. It has been previously said that there occur tin placer deposits in that area. (3)The northern side of the Yarlung Zangbo River,from Nyingchi to Sangri, belonging to an area of“S”type granites. As stated above,there are some favorable conditions for tin prospecting in eastern Tibet:(1)Late Yanshanian“S”type granites are widespread in this area;(2)some primary tin(tungsten)deposits,tin placer deposts and a series of tin placer occurrences have already been discovered;(3)the famous south- eastern Asia tin belt extends northward to western Sichuan and western Yunnan, and this area belongs to the extension part of that belt.It is therefore consi- dered that the tin prospecting in this area is based on solid geological back- ground.

本文根据川西、滇西已发现锡矿床,西藏东部已发现很有远景的锡矿点,结合锡矿成矿的一般规律,论述了该区锡成矿的有利地质因素,指出西藏东部应属东南亚锡矿带的北延部分,具有良好的成矿前景,并具体划分了几个锡矿成矿远景区,以资西藏找锡工作参考。

 
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