instructor
noun [ C ] uk/ɪnˈstrʌk.tər/ us/ɪnˈstrʌk.tɚ/
B1 教练
a person whose job is to teach people a practical skill
an aerobics instructor 有氧健身操教练
a driving/ski/swimming instructor 驾驶／滑雪／游泳教练
US大学讲师
a teacher of a college or university subject, who usually teaches a limited number of classes
a history/science/sociology instructor 历史／科学／社会学讲师