prolonged

长时间的、持续很久的、延续的

Prolonged exposure to loud noise can damage your hearing.

长时间暴露在噪音中会损害听力。

漫长的、冗长的含贬义

After a prolonged silence, she finally answered the question.

经过一阵漫长的沉默后，她终于回答了那个问题。

延长、拖长prolong 的过去式与过去分词

The strike prolonged the shortage of fresh vegetables in the city.

这场罢工延长了市内新鲜蔬菜短缺的时间。