in a way that shows that you are determined to do something despite difficulties, especially when other people are against you and think that you are being annoying or unreasonable 执着的;不屈不挠的;坚持不懈的 in a way that continues for a long period of time, or that is repeated frequently, especially in a way that is annoying and cannot be stopped synonym unrelentingly连绵的;持续的;反复出现的 persistently high interest rates 居高不下的利率