(in certain US and European universities and colleges)a member of the teaching staff immediately below professorial rank
(美国和欧洲一些大学级别低于教授的)讲师。
a person who acts as a guide, typically on a voluntary basis, in a museum, art gallery, or zoo
(博物馆、艺术画廊或动物园里的)讲解员(多指志愿者)。
"late 19th cent.: via German from Latin