We lived together, off and on, for two years.我们断断续续在一起生活了两年。She cried off and on all day.她整天不时地哭.It rains off and on.雨忽而下,忽而停....

off and on的音标：off and on的英式发音音标为：[ɔf ænd ɔn]off and on的美式发音音标为：[ɔf ənd ɑn]...

不时，断断续续地，间歇地，时作时辍...