introductory course
noun [ C ] US uk/ɪn.trəˈdʌk.tər.i ˌkɔːs/ us/ɪn.trəˈdʌk.tər.i ˌkɔːrs/ (UK foundation course)
（大学的）基础课程
a college or university course that introduces students to a subject and prepares them for studying it at a higher level