VOA慢速英语:Walking: The 'Wonder Drug'

wonder drug - n. a very effective drug or cure

strenuous - adj. requiring or showing great energy and effort

impact - n. the act or force of one thing hitting another

advantage - n. something (such as a good position or condition) that helps to make someone or something better or more likely to succeed than others

disadvantage - n. something that causes difficulty : something that makes someone or something worse or less likely to succeed than others

brisk - adj. moving or speaking quickly : quick and efficient

vigorous - adj. done with great force and energy

coronary - adj. of or relating to the heart and especially to the vessels that supply blood to the heart

learning curve - n. the rate at which someone learns something new : the course of progress made in learning something. < The job has a very steep learning curve. [=there is a large amount that has to be learned quickly in order to do the job] >

mood - n. the way someone feels : a person's emotional state

circulate - v. to move without stopping through a system, place, etc.