VOA慢速英语:Coffee May Help You Live Longer

decaffeinated – adj. not containing caffeine : having the caffeine removed

association – n. a connection or relationship between things or people

subjects – n. a person (or animal) used in an experiment, study, etc.

body – n. a group of things that are related or connected in some way​

moderate – adj. average in size or amount : neither too much nor too little

moderation – n. the avoidance of excess or extremes, especially in one's behavior or political opinions