受测者每四年之中所成家的体重为3.35磅，整整20年间，他们的体重增加超过了17磅。
Every four years, participants gained an average of 3.35lbs, putting on almost 17lbs over the full 20 year period.
受测者每四年之中所成家的体重为3.35磅，整整20年间，他们的体重增加超过了17磅。
Every four years, participants gained an average of 3.35lbs, putting on almost 17lbs over the full 20 year period.
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