VOA慢速英语:一生运动延缓衰老过程

commitment – n. a promise to do or give something

cyclist – n. someone who rides a bicycle

participant – n. a person who is involved in an activity or event

testosterone – n. medical : a substance (called a hormone) that occurs naturally in men and male animals

symptom – n. a change in the body or mind which indicates that a disease is present

male menopause – n. age-related changes in male hormone levels

coordinate – v. to work or cause to work together smoothly

sedentary – adj. not physically active

chicken-and-egg – adj. used to describe a situation in which it is difficult to tell which of two things happened first

portion– n. a part of a larger amount, area, etc.

priority – n. something that is more important than other things and that needs to be done or dealt with first