1. Rosa's constant refrain is that she doesn't have a life. 罗莎总是不断重复的一句话就是她生活得很无聊。
2. When breaking in an engine, you should refrain from high speeds for the first thousand miles. 磨合发动机时,你应当避免在最初的1千英里高速行驶。
3. Following the Harvard scandal, Mary Miller, the former dean of students at Yale, made an impassioned appeal to her school's professors to refrain from take-home exams. 哈佛丑闻发生之后,耶鲁大学前学生事务主任玛丽·米勒慷慨激昂地呼吁教授避免学生在家考试。
4. Complaints about poor food in schools have become a familiar refrain. 抱怨学校饭菜差已是耳熟能详的老调了。