He added that there is some evidence that oral HPV infection is also a risk factor for a type of cancer of the esophagus.
有一些证据表明口腔部位HPV的感染对食管肿瘤也是一个致病因素。
Surely this type of factor plays some part in the choice of a career.
这一类的因素在选择事业方面必定会起一定的作用。
Surely this type of factor plays some part in the choice of a career.
这一类的因素在选择事业方面必定会起一定的作用。
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