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ID:20521459
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页数:3页
时间:2018-10-13
《某些结构英语读法》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、某些结构的读法25wt% twentyfiveweightpercent150oC onefiftydegreecentigrade(温度有华氏(Fahrenheit)和摄氏(Centigrade)两种)1/2 onehalf1/3 onethird2/3 twothirds4/5 fourfifths/fouroverfive1.23 onepointtwothree0.01 zeropointzeroone2.X twopointsomething= isequalto/eq
2、uals> islargerthan< islessthan>> ismuchgreaterthana=b+c aisequaltobplusca=b-c aisequaltobminusca=b×c aisequaltobtimesc/aisequaltobmultipliedbyca=b/c aisequaltobdividedbyc/aisequaltobovercx2 xsquare/xtothesecondpower/xtothepowertwox3 xcube/xtotheth
3、irdpower/xtothepowerthreelognX logxtothebasena* astara’ aprimea’’ adoubleprime// isparallelto常用英文化学分子式、方程式及数学式的读法Na2SO4Sodiumsulphate;C-a-two-S-O-fourMg(OH)2magnesiumhydroxide;M-g-pause-O-H-pause-twice;M-g-inbracketstwiceCa2(PO4)3·2H2Ocalciumphosphatetwohy
4、drate;C-a-two-pause-P-Ofour-pause-threetimes-dot-two-Htwo-O[Zn(NH3)4]2+tetra-ammoniumzinccomplexcation=give;yield;produce,form,become↑evolvedasagas;giveoffagas↓isprecipitated;givesXprecipitatereactsreversiblyCu,DintheprecenceofacopperasacatalystonheatingCO32-+Ca2+=CaCO3¯acar
5、bonateanionwithavalancyoftwoplusacalciumcationwithavalancyoftwoproduceacalciumcarbonateprecipitateR’RprimeR”Rdoubleprime,RsecondprimeR1Rsubone100°ConehundreddegreesCentigrade+plus;positive-minus;negative×multipliedby;times/dividedby±plusorminus=isequalto;equals≡isidentically
6、equalto≈isapproximatelyequalto()roundbrackets;parentheses[]squarebrackets{}bracesa≥baisgreaterthanorequaltoba∝bavariesdirectlyasblognXlogXtothebasenthecubicrootofxthenthrootofxx2xsquare,xsquared,thesquareofxxnXtonfactors;thenthpowerofx;xtothepowernx-8xtotheminuseighthpower
7、x
8、
9、theabsolutevalueofxthemeanvalueofxthesumofthetermsindicated;summationof△xtheincrementofxdxdifferentialxdy/dxthefirstderivativeofywithrespecttox∫integral∞infinity1/2ahalf;onehalf2/3twothirds5/123fiveoverahundredandtwenty-three0.01OpointOone;zeropointzeroone;noughtpointnought
10、one6%6percent3‰3permille2:3theratiooftwotothreer=xdrequalsxmultipliedbyd5×2
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