VOA慢速英语2016.09.24 英语, period, linked, about, death

Rebecca949

__________________________________________. Researchers found that moderate coffee drinking was linked with a reduced risk of death from many diseases. Subjects in the study had to answer questions about their coffee drinking habits every four years over a 30-year period. __________________________________________。研究人员发现，适量咖啡和诸多疾病的死亡风险降低有关联。这项研究中的受试者在三十年间每四年必须就他们喝咖啡的习惯回答问题。

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