undergraduates as a whole historically embraced a college life—complete with fraternities, clubs, and social activities—hat was produced, shaped, and defined by a peer culture oriented to nonacademic endeavors.

today, full-time college students on average report spending only twenty-seven hours per week on academic activities—hat is, less time than a typical high school student spends at school.

윗문장의 hat was, ,두번째 문장의 hat is요....단순 오타는 아닌 거 같은데 도저히 해결이 안되네요. 도와주시면 감사하겠습니다.