adj.持續(xù)很久的

prolong的過去式（分詞）.

The meeting may be prolonged into the evening because so many problems have to be solved tonight. 會(huì)議可能要延長到夜里，因?yàn)榻裢碛刑鄦栴}要解決。

After prolonged discussion, the representatives hammered out a form of words that was acceptable to everyone. 代表們經(jīng)過長時(shí)間的討論之后，終于想出一種大家都能接受的措辭方式。

After prolonged questioning, she finally confessed. 她受到長時(shí)間的盤問之后,終于承認(rèn)了。