VOA慢速英语:Fabric Fights Dust Mites in Your Bed

allergy – n. a medical condition that causes someone to become sick after eating, touching, or breathing something that is harmless to most people

asthma – n. a physical condition that makes it difficult for someone to breathe

enzyme – n. a chemical substance in animals and plants that helps to cause natural processes

coughing – n. forcing air through your throat with a short, loud noise

fabric – n. a piece of cloth or textile