Science has shown that individuals have genetically determined ranges of weights,spanning perhaps 30 or so pounds for each person.But that leaves a large role for the environment in determining whether a persons weight is near the top of his or her range or near the bottom.As people have gotten fatter,it appears that many are edging toward9 the top of their ranges.The question has been why.
If the new research is correct,it may say that something in the environment seeded what some call an obesity epidemic,making a few people gain weight.Then social networks let the obesity spread rapidly.
词汇:
obesity/Eu5bi:sItI/n.肥胖,肥大 virus/5vaIErEs/n.病毒
detailed/5di:teIld/adj.细的,逐条的investigator/In7vestI5^eItE/n.调查人
spouse/spauz/n.配偶 sibling/5sIblIN/n.兄弟,姐妹
influence/5InfluEns/n.影响 principal/ 5prInsIpl/adj.主要的,首要的
highlight/5haIlaIt/v.使显著,强调 epidemic/7epI5demIk/adj.流行的,传染的,流行性的
注释:
1. The investigators knew...over three decades.:调查人员了解被调查人的朋友以及夫妻、兄弟姐妹或者邻居,并且了解他们三十年来各个时期的体重。as well as表示和、又。
2. reconstruct:重建,推想。re是表示又,再之义的词根。
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