在中外医学作者撰写的前言中 第一人称代词复数we后接动词的主动语态为前言部分中主要的使用形式. 作者在语步3中通过提出研究理论或方法、陈述研究的目的以及报告其研究结果或发现 来说明作者自己在研究中做了哪些工作. 例如：We investigated differential expression of these genes in various tissues and under various stresses or conditions allowing us to develop a greaternderstanding of the importance of the PI pathway. (J14?7)We used the full?length HPO (15ku) fused to GAL4 DNA?binding domain as bait in the yeast two?hybrid system to creen a human testis cDNA library. (J12?2) We designed a series of primer pairs based on the equences of the conserved regions of the rat and monkey homolous gene cDNA. (J8?3) We ompared the hormonal patterns in volunteers participating in a contraceptive trial with levonorgestrel implants and testosterone endcannoate injectable at an aim to identify possible factors contributing to the differences in spermatogenic suppressionbetween esponders and non?responders in Chinese men. (J13?1) In this study we observed the clinical efficacy of CVVH in the treatment of acute necrotizing pancreatitis. (J6?2)We developed a fluorescent polymerase chain reaction ethod according to the published genome sequence of the SARS?associated coronavirus. (J6?3)We examined a number of local populations of D. lacertosa almost covering the known geographic range of this pecies. (J14?5)Here we report the results ofthe second planned interim analysis which we are releasing in accordance with the recommendation of the independent data and safety onitoring committee. (J2?1) We present a review of OSAS children diagnosed between January 1997 and December1998 and their outcomes. (J6?4) In this study we identified a novel human testis specific gene TSP1 which encodes a putative bHLH?Zip transcription factor. (J13?4) We conducted a case?control study using data from the Massachusetts Department ofpublic Health?s Complaint and Incident Reporting System and from MDs assessments to provide a broad examination of the types of injuries that result from resident?to?resident violent incidents. (J1?3) We present new data on the health insurance coverage characteristics of adolescents …. We assess the health insurance status of dolescents …. We then examine trends in adolescent health care coverage …. (J1?4) We prospectively studied a large community?based sample of persons in whom plasma ariuretic peptide levels were routinely measured and who were followed for the occurrence of major cardiovascular events and death. (J2?5)We have found this technique particularly useful where traditional fixation techniques are inadequate because of trochanteric comminution or deficient bone stock. (J8?5)

但就提出研究目标和目的而言 外国医学作者多用we aimed to 而中国医学作者多用the aim/purpose of the research is/was…，或 the research/study was to…. 例如 The purpose of this study was to determine whether TP could reduce the chronic CsA nephrotoxicity and the xpression of TGF in tubular and interstitial cells in the rate model of CsA?induced chronic ephrotoxicity. (J8?7) The aim of this prospective study was to evaluate the relationship between gastric H pylori infectionand reflux esophagitis (RE) BE and gastric IM in China. (J11?3)The present study was to investigate the effects of Res on the secondary spinal cord edema. (J7?6)study was undertaken to review our results in treating compromised abductorswith tension band in revision total hip arthroplasty. (J5?4)The present study aimed to make a comprehensiveanalysis on phyulogenetic relationships of the family yprinidae based on complete cytochrome b gene sequences. (J9?2)The present study is to clone its homologue from rat testis. (J14?2) We aimed to establish if asymptomatic ubduralhaemorrhages arise after delivery to assess their frequency and to ascertain their resolution. (J3?3)