VOA慢速英语:不同坐姿仍有好坏之分?

desk – n. a work surface; a place where one sits and works

focus – v. to direct your attention or effort at something specific

leisure - n. time when you are not working : time when you can do whatever you want to do

recommend – v. to propose or suggest

vigorous - adj. done with great force and energy

snack - n. a small amount of food, usually eaten between meals

risk factor – n. something that increases one's risk

stairs – n. a series of steps for moving from one level to the next

elevator – n. a device that raises or lifts something up

beneficial – adj. helpful; useful