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1.ColumnAgivessquareroots.Extractingasquarerootisanoperation,whichcanbehandledbysliderule.A栏给出了平方根。求平方根的运算可以用计算尺来进行。2.Amaterialobjectcannothaveaspeedgreaterthanthespeedoflight.一个物体的速度绝不会超过光速。3.Distillationinvolvesheatingthesolutionuntilwaterevaporates,andthencondensingthevapor.蒸馏就是要把溶液加热,直到水蒸发,然后再使蒸汽冷凝。4.Toreturntothemainmenuatanytime,presstheMENUbuttonontheremotecontrol.5.Ifwecloseoureyes,wecannotseeanythingbecauseoureyelidspreventtheraysfromenteringoureyes.6.Weshallmentionheretwotemperaturescales,namely,theFahrenheitscaleandtheCentigradescale.这里我们将提及两种温标:华氏温标和摄氏温标。7.Thepowerplantistheheartofaship.动力装置是船舶的心脏。8.Thepowerunitfordrivingthemachinesisa50-hpinductionmotor.驱动这些机器的动力装置是一台50马力的感应电动机。9.Traditionally,ruralhighwaylocationhasbeenfieldoriented,butthemodernmethodis“office”oriented.10.A)Electrodepotentialdependsontheconcentrationoftheions.电极电位决定于离子浓度。(chemistry)11.B)Thedeterminationoftraceconcentrationsofmercuryinmineralsisdescribed.文章论述矿物中痕量汞的测定。(measurementinphysics)12.C)Aconcentrationprocessisimportantnowthatthedepletionofhighgradeoresispossibility.由于目前高品位的矿石可能用完,富集过程是重要的。(metallurgy)13.Electricpowerbecametheservantsofmanonlyafterthemotorwasinvented.只是在发动机发明之后，电力才开始造福人类。14.Thusthenumberofionsbuildsupveryrapidlyandadisruptivedischarge,orspark,occurs.(使破裂的,分裂性的)这样，离子数目迅速增加，发生“击穿放电”，也就是电火花。15.Morethan100chemicalelementsareknowntoman;ofthese,about80aremetals.人类已知的化学元素在100种以上，其中约有80种是金属。4.Thesquareonthelongestsideofanyright-angledtriangleisequaltothesquaresontheothersidesaddedtogether.任一直角三角形斜边的平方都等于另两条直角边的平方和。5.Semiconductordeviceshavenofilamentorheatersandthereforerequirenoheatingpowerorwarm-uptime.半导体器件没有灯丝或加热器件，因此不需要电加热或加热时间。6.Manypeoplewouldratherhavegastoknockthemoutbeforetheyhavetheirteethout.许多人在拔牙之前喜欢用气体麻醉剂麻醉。7.ItwasNewtonwhoprovedmathematicallythatthepathofaplanetmustbeanellipse.正是牛顿用数学方法证明了行星的轨道是椭圆形的。8.Acupunctureistheplacingofhair-thinneedlesintotheskinsatspecialpointsofthebodytoeasepainandtreatailments.所谓针灸疗法就是把头发般细的针刺入身体特定部位的皮肤，以达到镇痛和治疗疾病的效果。9.Theglobalsatellitephoneservicehasopenedforbusiness,givingpeoplethepowertomakeandreceivecallanywherefromMountainEveresttotheDeadSea.全球卫星电话业务已开通，从珠穆朗玛峰到死海的任何地方，人们都可以打电话和接电话。10.Cloningtechniquesvaryfromsimpleplantcuttingstothereplicationofadultmammalsfromtheirgeneticmaterial.从简单的植物插条到用遗传材料复制成年哺乳动物，克隆技术各不相同。11.Youcanrectifythisfaultifyouinsertaslash./Rectificationofthisfaultisachievedbyinsertionofawedge.插入一条斜线便可以纠正此错误。12.Wecanimproveitsperformancewhenweusesuper-heatedsteam./Animprovementofitsperformancecanbeaffectedbytheuseofsuper-heatedsteam.可以使用超热蒸气改进其性能。13.Thedependenceoftherateofevaporationofaliquidontemperatureisenormous.液体蒸发速度很大程度上取决于它的温度。14.Theconstructionofsuchsatelliteshasnowbeenrealized,itsrealizationbeingsupportedwithalltheachievementsofmodernscience.由于得到现代科学所有成就的支持，现在能制造出这样的卫星。15.Anum...