ivory tower

1. N-COUNT If you describe someone as living in an ivory tower, you mean that they have no knowledge or experience of the practical problems of everyday life. 象牙塔; 指脱离实际生活和经验的闭塞空间[usu prep N, N n] [表不满]

They don't really, in their ivory towers, understand how pernicious drug crime is. 身处象牙塔里，他们并不真正懂得毒品犯罪多么有害。