VOA慢速英语:深呼吸对肺部有帮助

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respiration – medical noun : the act or process of breathing / respiratory – adj.

cavity – n. a hole or space inside something

relax – v. to make or become loose or less tense

stress – n. a state of mental tension and worry caused by problems in your life, work, etc.

shallow breathing – medical verb : take in small amounts of air

stale – adj. not clean, clear, or pure

inhale – v. to breathe in / inhalation – n.

exhale – v. to breathe out / exhalation – n.