Several noted nutritionists and research projects have concluded that this diet is one of the most healthful in the world in terms of preventing such illnesses as heart disease and cancer, and increasing life expectancy.
2017年12月六级真题(第一套)听力 Section C
柯林斯高阶英汉双解学习词典释义
ADJ-GRADED
有益于健康的;促进健康的
Something that is healthful is good for your health.