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No Pain, All Gain

ChinAfrica 2024年第7期16卷 40-41页

作者： ALAFATI MUGABO

Chinese doctors in Rwanda revolutionise childbirth by making painless deliveries affordable In a move that could transform childbirth procedures in Rwanda,Chinese doctors at the Masaka District Hospital in Kicukiro have successfully facilitated natural birth by a woman living with *** milestone marks a significant step towards safer and more accessible childbirth practices in the country.

关键词： doctor birth afford

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聚焦afford用法

中学英语之友(上旬) 2010年第10期 19-19页

afford是新目标七年级(上)Unit7中的四会词之一,你想知道它的用法吗?***意为"付(花)得起、负担得起",指有(金钱或时间)条件(做某事)。在具有这种意义时

关键词：七年级 afford 间接宾语

The future challenges in molecular water oxidation catalysts

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Journal of Energy Chemistry 2022年第10期31卷 643-645,I0016页

作者： Tianqi Liu Licheng Sun Department of Chemistry School of Engineering Sciences in Chemistry Biotechnology and HealthKTH Royal Institute of Technology10044 StockholmSweden State Key Laboratory of Fine Chemicals Dalian University of Technology(DUT)Dalian 116024LiaoningChina Centre of Artificial Photosynthesis for Solar Fuels and Department of Chemistry School of ScienceWestlake UniversityHangzhou 310024ZhejiangChina

Energy is the bedrock of a functioning society,and artificial photosynthesis provides a possible solution for the generation of clean and affordable energy by storing the power of sunlight in chemical fuels via proton... 详细信息

关键词： dioxide afford artificial

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Catalyst-free reductions of nitriles to amino-boranes using sodium amidoborane and lithiumborohydride

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Organic Chemistry Frontiers 2022年第6期9卷 1536-1540页

作者： Jiamin Peng Yuwei Song Yingying Wang Zhenxing Liu Xuenian Chen College of Chemistry Zhengzhou UniversityNo.100 Science AvenueZhengzhou450001China

An efficient and facile method to reduce nitriles to amine-boranes was *** and aliphatic nitriles were readily reduced in the presence of both sodium amidoborane(NaAB)and LiBH4 at room temperature in THF without catalysts,affording products in up to 99%*** products can be easily hydrolyzed to afford primary amines or utilized as reducing reagents for one-pot reductive *** key finding of the reaction study is the synergy effect between NaAB and LiBH4;otherwise the reaction yield would drop substantially from 92%to 22%or 12%when NaAB and LiBH4 are used separately.

关键词： nitrile afford lithium

Rh-Catalyzed Reaction of Propargylic Alcohols with Aryl Boronic Acids-Switch from β-OH Elimination to Protodemetalation

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Chinese Journal of Chemistry 2020年第4期38卷 331-345页

作者： Weiyi Wang Hui Qian Shengming Ma Research Center for Molecular Recognition and Synthesis Deportment of ChemistryFudan University220 Handan LuShanghai 200433China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of Sciences345 Lingling LuShanghai 200032China

Summary of main observation and conclusion It is known that Rh-catalyzed reaction of propargyic alcohols with aryl metallic reagents undergoes Su2Z-type reaction affording alenes via a sequential arylmetalation andβ-OH elimination *** we report a Rh/Ag cocatalyed reaction of pro-pargylic alcohols with organoboronic acids affording stereo defined(E)-3-arlallylic alcohols via arylmetalation and protodemetalation with a high regio-and stereoselectivity under very mild *** reaction exhibits a good substrate scope and the compatibility with synthetically useful functional groups with no racemization for optically active propargylic *** a reaction may also be extended to homopropargylie alcohols with a remarka-ble regioselectivity and exclusive E-stereoselectity.

关键词： process. alcohols afford

Random Remarks on the Relation of Translatology to Grammar,Rhetoric,Semantics,Pragmatics and Other Linguistic Sciences

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上海翻译 1990年第4期 5-10,27页

作者：卢思源

*** and PragmaticsPragmatics is the study of language *** is a study of those relationsbetween language and context that are grammaticalized,or encoded in the structureof a *** includes the study of deixis,presupposition and speech *** is tobe noted that there is also a close relation between translatology and *** following instances afford an illustration of this point.

关键词： pragmatics usage presupposition sentence something render afford noted trouble pronunciation

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CRYSTAL AND MOLECULAR STRUCTURE OF 2-PHBNYLQUINOXALINE

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Chinese Journal of Structural Chemistry 1989年第1期 40-43页

作者： Yang Qingchuan Li YiliInstitute of Physical Chemistry, Peking University, Beijing

C14H10N2,Mr =206.24, space group P21/n, a =5.861(3), b =10.230 (5), c =17.440(11) A,β=92.07(5)°,V= 1045(1) A3,Z=4, Dx=1.31 ***-3, MoKa radiation,u=0.73 cm-1,F(000)=432,R=0.063 for 1054 observed reflections. 2-Phenylquinoxaline molecule is approximately planar. The dihedral angle between the quinoxaline ring and the substituted phenyl ring is 7.0°. The C-C bond distance connecting these two rings is 1.495(4) A. The whole molecule is a conjugation system.

关键词： substituted rings planar connecting afford bonding usual resist excel 勺甲

江苏省扬州市“五个一百工程” 小学英语读后写作荣获二等奖作品

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英语角 2022年第18期 38-39页

Light Up Our Learning This is a well-known story from an ancient Chinese *** poor boy couldn't afford even a *** he made a hole in the wall to"steal"light from his neighbour's house to read at *** moral of the story is that we should spare no effort to get knowledge and never become discouraged easily no matter how difficult the situation may be.

关键词： idiom 江苏省扬州市 afford

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江苏省扬州市小学英语读后写作

英语角 2022年第27期 38-39页

Cat the Wall to “Steal” Light During the winter holiday,Iead a well-known Chinese indiom story from English *** story mainly tels us that a boy named Kuang Heng was so poor that he couldn't afford candles.

关键词：江苏省扬州市 winter afford