同根派生 under class相关词英汉例句Is thought be a car belonging to the lower class in the U.S.在美国会被看成是属于下层阶级的。The upperclassman and his underclass mothers learned together in cooking class.高年级的学生和他的下层阶级的母亲一起在烹饪课上学习。under class更多例句