VOA慢速英语:中国探索蟑螂的多种益处

cell – n. any one of many similar sections that together form a larger structure

pest – n. an animal or insect that causes problems for people especially by damaging crops

landfill – n. an area where waste is buried under the ground

kitchen – n. a room in which food is cooked

prosperity – n. the state of being successful usually by making a lot of money

extract – n. a substance that you get from something by using a machine or chemicals

ulcer – n. a painful, sore area inside or outside the body

moat – n. a deep, wide ditch that is usually filled with water and that goes around the walls of a place