一位历受尊敬的科学家皮特•杜博格，这位研究病毒性癌症的先驱未曾抛弃这种猜想。
One once-respected scientist, Peter Duesberg, who did early research on viral causes of cancer, would not drop the idea.
这周的新闻词汇来自一则关于尼日利亚博尔诺州迈杜古里城发生的事情的新闻中。
This week's news word comes from the city of Maiduguri in Borno State, Nigeria.
杜博肯博士说：“即使没有明显发烧症状，在紧张的锻炼状况下，一些鼻窦感染会导致肺炎，更严重的会导致呼吸衰竭。
Even without the presence of a fever, says Dr. Dobken, some sinus infections, when stressed by exercise, can lead to pneumonia or, in extreme cases, respiratory failure.
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