peripatetic
/ˌperɪpəˈtetɪk; ˌpɛrəpə`tɛtɪk/ adj
1 going from place to place 到处走的; 漫游的; 巡回的.
2 (Brit) (of teachers) employed at two or more schools and travelling between them （指教师）在多所学校兼课的
Peripatetic music teachers visit the school regularly. 兼职音乐教师定期到校授课.