VOA慢速英语:新冠病毒是如何影响肺部的?

reserve – n. a supply of something that is stored so that it can be used at a later date

capacity – n. the ability to hold, receive or store something
overwhelm to defeat (someone or something) completely

cough – v. to force air through your throat with a short, loud noise often because you are sick

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

inflame – v. to cause (a part of your body) to grow sore, red, and swollen inflammation – n. a condition in which a part of your body becomes red, swollen, and painful

radiologist – n. a doctor that specializes in a branch of medicine that uses some forms of radiation (such as X-rays) to diagnose and treat diseases

take its course – idiom : to allow something to happen without trying to control it