visitor
noun
a person visiting a person or place,especially socially or as a tourist
参观者；游客
■(一般作 visitors)a member of a sports team on tour or playing away from home
来访运动队队员；客队队员
■(Brit.)a person with the right or duty of occasionally inspecting and reporting on a college or other academic institution
(英)（大学或其他学术机构）督察员,督导
■(Ornithology)a migratory bird present in a locality for only part of the year
(鸟)暂栖候鸟