VOA慢速英语:戴两个口罩能提供更多的保护吗？

precaution – n. a measure taken beforehand to prevent harm or secure good

household – n. the people in a family or other group that are living together in one house

mask – n. a covering used to hide or disguise your face

loose – adj. of clothing : not fitting close to your body : not tight

layer – n. a covering piece of material or a part that lies over or under another

snugly – adv. fitting closely and comfortably

surgical mask – n. a rectangular-shaped face mask (as of fabric or polypropylene fiber) that is typically secured by two straps tied in the back of head and is intended to be worn by medical personnel during surgical procedures especially to protect the wearer against splashes or splatters of blood or body fluid and to prevent contamination of the patient's surgical wounds

first responder – n. a person (such as a police officer or an EMT) who is among those responsible for going immediately to the scene of an accident or emergency to provide assistance

filter – n. a device that is used to remove something unwanted from a liquid or gas that passes through it

woven – adj. to form (as cloth) by lacing together strands of material