Yet mr obama has been harping on about raising taxes on the rich since his first election campaign .
不过,奥巴马自第一次竞选活动起就喋喋不休地谈论提高对富人的征税幅度。
He keeps harping on the importance of discipline .
他唠唠叨叨老是说着纪律多么重要。
If the harping eventually inspires rules that restrict google 's data collection , it could make its search engine less relevant and its ad network less profitable .