VOA慢速英语:户外教育在寒冷中继续进行

pollination – n. to move pollen from one flower to another

erosion – n. the process by which something is worn away

outdoor – n. done, used, or located outside a building

begging – v. to ask (someone) in an emotional way for something needed or wanted very much

buckets – n. an open container with a handle that is used especially to hold and carry water and other liquids

varying – v. to be different or to become different

suburban – n. a residential area near to a city

relevancy – adj. relating to a subject in an appropriate way