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英文摘要的字?jǐn)?shù)大多數(shù)期刊規(guī)定不超過250個(gè)詞，內(nèi)容應(yīng)與中文摘要對(duì)應(yīng)。醫(yī)學(xué)論文中，一般少用第一人稱和主動(dòng)語態(tài)，多用第三人稱和被動(dòng)語態(tài)，用以體現(xiàn)敘述客觀事實(shí)。所用時(shí)態(tài)需與事情發(fā)生時(shí)間一致，敘述基本規(guī)律時(shí)可用現(xiàn)在時(shí)，敘述研究對(duì)象、方法和結(jié)果時(shí)，用過去時(shí)。舉例如下。

Objective:ThepurposeofthisstudywastodeterminewhetheraninhospitaltransportableCTscannercanprovidediagnosticbrainimagesandtocomparethequalityoftheseimageswiththosefromaconvertionalfixed?platformCTscanner.

SubjectsandMethods:Twentysevenpatientswithknownorsuspectedintracranialpathologyunderwentimagingonatransportablescannerandafixed?platformscannerwithin1hrofeachother.ImagesfromeachCTexaminationwereevaluatedindependentlybytwoneuroradiologistswhowereunawareofpatienthistory.Conspicuousnessofintracranialpathologyandnormalanatomywereratedona5?pointscale(1point''''optimal;5points''''poorornotvisualized).Statisticalcomparisonsweremadeusingnonparametrictests.

Results:SevenCTscanswereinterpretedasshowingnormalfindingsand20scansrevealedintracranialpathologyonbothCTscanners.Imagequalitywashigheronthefixedscanner(averagerating''''2.42points''''SE=0.12)thanonthetransportablescanner(averagerating''''3.10points''''SE=0.12(p=0.001).Depictionofthecerebellum''''midbrain''''andsupratentorialgray?whitematterwasbetteronthefixedscanner(p＜0.05＝.However''''wefoundnosignificantdifferencesindetectionofintracranialpathologybetweenscanners.Bothradiologistsfoundimagesfrombothscannerstobediagnosticinall27patients.

Conclusion:ImagesofthebrainonthetransportableCTscannerwerelessclearthanthoseonafixedscanner.However''''imagesfromthetransportableCTscannerwerediagnosticin27consecutivepatients.TheimplicationsofthisfindingareimportantfortheprovisionofCTservicesforcriticallyillpatientswhocannotbetransportedtotheradiologydepartment.

上面是AJR(美國放射學(xué)雜志)中一段完整的英文摘要，從中可以看出其特點(diǎn)：①用詞簡練、準(zhǔn)確；②時(shí)態(tài)為過去時(shí)；③不用第一人稱，多用被動(dòng)語態(tài)；④方法和結(jié)果中強(qiáng)調(diào)統(tǒng)計(jì)方法及數(shù)據(jù)。對(duì)母語非英語的作者來說，撰寫英文摘要的質(zhì)量好壞直接與作者的英文水平有關(guān)，在這方面，只有多閱讀英文文獻(xiàn)，才能提高英文寫作水平，從而寫出高質(zhì)量的英文摘要。