prolonged

adj.持续很久的

prolong的过去式（分词）.

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。

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。

After prolonged questioning, she finally confessed. 她受到长时间的盘问之后,终于承认了。