80年代流行病学的研究表明:吃富含β-胡萝卜素的食物可降低肺癌发病率1981年流行病学家提供了令人注目的科研成果:自1957年以来,研究人员跟踪2000人研究在吃195种特定的食物与肺癌 Epidemiological studies of the 1980s show that eating foods rich in beta-carotene can reduce the incidence of lung cancer Epidemiologists in 1981 provided compelling scientific results: Since 1957, researchers have followed 2,000 studies in Eat 195 specific foods and lung cancer