Dr. Mark Hamer of University College London says previous research found that smokers have a higher rate of mental illness, specifically depression.
英国伦敦大学学院的马克·哈默医生说,早先的研究发现,吸烟者患精神疾病的比率较高,特别是抑郁症。
Mark Bedau of Reed College in Oregon says Mister Venter's work marks an important step over traditional genetic engineering of individual genes.
VOA: special.2010.07.20
Dr.Mark Hamer of University College London says previous research found that smokers have a higher rate of mental illness, specifically depression.
VOA: standard.2010.06.15
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