慢速英语:自杀和药物过量死亡降低了美国人的预期寿命

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overdose – n. an amount of a drug or medicine that is too much and usually dangerous

statistic – n. a number that represents a piece of information

synthetic – adj. made by combining different substances : not natural

influenza – n. a common disease that is caused by a virus and that causes fever, weakness, body aches, and breathing problem

diabetes – n. a serious disease in which the body cannot properly control the amount of sugar in your blood because it does not have enough insulin