VOA慢速英语:名师问答：not 和 no 之间的区别

park – n. a large public green space

shelf – n. an object that provides a surface for the storage of objects

library – n. a building or room containing books and other publications, and sometimes videos

nickname – n. a name that is different from your real name but is what your family and friends call you when they are talking to you or about you