prolonged

动词 prolong:

1. lengthen in time; cause to be or last longer
   同义词：prolong, protract, extend, draw out
2. lengthen or extend in duration or space
   同义词：prolong, sustain, keep up

形容词 prolonged:

1. relatively long in duration; tediously protracted
   同义词：drawn-out, extended, lengthy, protracted
2. drawn out or made longer spatially
   同义词：elongated, extended, lengthened
3. (of illness) developing slowly or of long duration

1. The meeting may be prolonged into the evening because so many problems have to be solved tonight.
   会议可能要延长到夜里，因为今晚有太多问题要解决。
2. After prolonged discussion, the representatives hammered out a form of words that was acceptable to everyone.
   代表们经过长时间的讨论之后，终于想出一种大家都能接受的措辞方式。
3. The crowd burst into prolonged cheering.
   人群中爆发出长时间的欢呼声。
4. After prolonged questioning, she finally confessed.
   她受到长时间的盘问之後，终於承认了。