Infection with head lice is no reflection on personal hygiene.
染上头虱并不会给个人卫生带来不好的影响。
We studied 132 children without head lice who lived in a slum in north-eastern Brazil.
针对生活在巴西东北部贫民区内的132名无头虱症的儿童开展了一项研究。
Human head lice are related genetically to lice on chimpanzees, and the two species began to diverge as humans and chimps diverged.
人类头上的虱子同黑猩猩身上的虱子有遗传学上的关联。随着人类和黑猩猩的分化,这两种虱子也开始分道扬镳。
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