长期失业是许多国家的一个严重问题。

___Long-___term unemployment is a serious issue in many countries.

为重症患者提供长期护理需要专门的资源。

Providing ___long-___term care for the seriously ill requires dedicated resources.

动物园和学校之间的长期合作给我留下了深刻的印象。

I was deeply impressed by the ___long-___term cooperation between the zoo and the school.