And that, report researchers from Harvard University and the University of Texas in the current issue of the journal Nature, is where evolution enters the story.

哈佛大学和德克萨斯大学研究员在当期《自然》杂志上发表报告，用进化解释了这一问题。

youdao

But in 1938, Dr Arlie Bock, the director of the then Department of Hygiene at Harvard University, wondered whether studying sick people was only half of the story.

但是，在1938年，哈佛大学卫生系主任Arlie Bock博士怀疑，研究病人只是故事的一半。

youdao

But in 1938, Dr Arlie Bock, the director of the then Department of Hygiene at Harvard University, wondered whether studying sick people was only half of the story.

但是，在1938年，哈佛大学卫生系主任Arlie Bock博士怀疑，研究病人只是故事的一半。

youdao