a. 延续的, 长时间的
在线英汉词典

prolonged的短语、例句：

prolonged adj [usu attrib 通常作定语] continuing for a long time 持续很久的; 长时间的
After prolonged questioning, she finally confessed. 她受到长时间的盘问之後, 终於承认了.
There will be prolonged delays for rail travellers. 乘火车的旅客要长时间受阻.