untenured
/ˌʌnˈtenjʊəd/adjective
1- (of a teacher, lecturer, or other professional) not having a permanent post（教师, 讲师或其他专业人员）无终身职位的。
1.1
- (of an academic or other post) not permanent（学术或其他职位）非永久性的, 非终身职位的。