VOA慢速英语:Study: Do Fitness Trackers Help You Lose Weight?(翻译)

fitness ­– n. the quality or state of being fit

tracker – n. a device that is aware of a fact, progression or condition

counseling – n. advice and support that is given to people to help them deal with problems, make important decisions, etc.

calorie – n. a unit of heat used to indicate the amount of energy that foods will produce in the human body

composition – n. the way in which something is put together or arranged : the combination of parts or elements that make up something

journal – n. a magazine that reports on things of special interest to a particular group of people