新世纪医学英语教程(生物医学)课后翻译答案unit15

PAGEPAGE3/3ReadingA1细胞的专化程度越高，失去有丝分裂能力的可能性越大。神经元是体内分化2.在此情况下，体内有属于同一谱系的母细胞，这些细胞尚未分化到失去分裂能力的程度。它们已经得到充分的分化，因而它们产生的子细胞限定于同一细胞体系；但尚未分化到丧失积极增生潜力的程度。ReadingB11.Normally,therateofcellreproductionandtheprocessofcelldifferentiationarepreciselycontrolledsothatbothofthesemechanismsceaseoncetheappropriatenumbersandtypeofcellareformed.Cellwallsareverythinsothatoxygenandcarbondioxidecaneasilygetthrough.3.Manycells,especiallythoseofthecentralnervoussystemandtheheart,areextremelysensitivetolowbloodlevelsofoxygenresultsinseriousdamage.4.Theundifferentiatedstemscellsthat canbetriggeredtoenter thecellaredifferentfromthecellsthatcontinuetodivideandreproduce.5.Inthebloodtherearemanyredbloodcellsthatserveasvehiclesforcarryingoxygen.6.Besidesneurons,thereareotherwell-differentiatedcellsthatareunabletodivide.ReadingA21.虽然发炎的影响因其令人不快和造成不适而常被认为是不好的，但发炎过程就其实质而言对人体却是有利的，它使人能应付日常压力的影响。2.小小一块局部红肿就足以防止蚊叮产生伤害，而严重的情况，如阑尾炎，则可引起发烧、白细胞增多，乃至大量体液和蛋白质聚集到炎症部位。ReadingB21.Althoughallpathogensposepotential threatsifthey gainentry thechancesofthisoccuringareactuallyquitesmall.2.Althoughpainisoftennotconsideredanactualbodydefensemechanism,theroleofpaininthebody’sresponsetoinvasioncannotbeignored.3.Referredpainmeansthatthepaincanbepresentinagivenplacealthoughthesourcemaybeelsewhere.4.As the process continues, monocytes exit the and mature macrophagesinthetissueenvironment.5.Asbodytemperaturerises,thebodyisstimulatedtoproducemorewhitebloodcells.6.Asyourbodyproducesitsownantibodies,youwillnothavetoworryaboutsubsequentexposuretothedisease.ReadingA3晶状体中心浑浊可能隔断视轴，造成可见到两个或多个模糊视象的视觉缺由眼底红色背景衬映的混浊。20/50白内障有可能导致其他眼病，如继发性青光眼和色素层炎，则最佳矫正视力在20/40甚至更好一些，仍然可能适宜进行手术ReadingB31.Ithasbeenprovedthatmostcongenitalcataractsarenotprogresiveandarenotdenseenoughtocausesignificantvisulaimpairment.2.ithas beenreportedthatoverexposuretoheat ortoionizing radiationmaycausetraumaticcataracts.3.Itwasthoughtbysomethatmuchuseoftheeyesforschoolworkmayhaveplayedapartincausingmyopia;butithasbeenfoundthatpeoplewhodonotd anyreadingsufferfromtheproblemtoasgreatadegree.4.Pressurewithintheyemayincrease,slowlydestoryingtheopticnerve.Blinkingyoureyesmoreoftenatworkspreadsatearfilmovertheeyes,keepingthemmoist.Whentheciliarymusclecontrats,the ligamentrelaxesandthelensbecomesmorenearlyspherical,enablingtheeyetofocusonobjectsthatarenearertotheeye.ReadingA4的因素时作为了唯一一个有限的涵义。为了使特异性抗菌治疗直接攻击它，因此我们应该作出每一份合理的努力去确立每一个肺炎病人的可能致病的病原微生物身份，因为如果没有这个信息，一些病人用别的方式治疗的将不会痊愈。ReadingB41.Whentheinfectiouscauseisnotknownitisusefultoconsiderwhetherthepneumoniaiscommunity-acquiredornosocomial.The anatomicalclassificationofpneumoniaconcersonlytheextentanddistributionoftheinflammatoryprocessregardlessofwhetheritiscausedbyStreptococcuspneumoniaeorbyotherorganisms. 症过程的程度和分布，而不管她是由肺炎球菌还是由其他细菌引起。Thegeneralpublicbebetterinformedaboutwhethertheairtheybreatheisfreshandclean. 净。Recentstudieshaveshownthathospital-acquiredinfectionsarefarmorefrequentthanwasoriginallythought. 壁原先认为的情况要多得多。Adolescentsareapparentlymoreimmunetocertainrespiratoryinfectionsthanaretheelderlymembersofthe对某些呼吸道感染有更多的免疫力。Bronchopneumonia,inwhichthediseaseprocessisscatteredhereandtherethroughoutthelung,ismorecommonthanlobar整个肺部的支气管炎，比大叶性肺炎更常见。ReadingA5

过程散见于PH能力或酸化尿液的人，二价和三价的磷酸盐结合钙形成磷酸钙结石会增加。尿酸结石的形成另一方面会在酸性尿液中增多，结石的生成可以通过用碱性钾盐提高尿液PH到6.0～6.5来减少。高质量光学设备的发展，使用它使整个过程可以进行的更轻松，也使它的成果提高了。这个过程是在X线透视检查的引导下进行的，涉及到多种工具用来扩大输尿管，抓住和移动结石。ReadingB5Radilogicalstudiesusingacontrastmedumaredonetodeterminethepositioofthestoneanddirecdttheplacementoftheureterosfope.Ifacertaintakesadrugoverdoseandlosesconsciousness,physcianscantetheurinetoidentifythedrugtaken.TheclusterofcapillarieswithinbonethewallthebulbofThespeedatwhichimpaired.

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