ivory tower

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But some parts of the ivory tower have proved harder to occupy than others.
但象牙塔的某些部分确实比之其他部分更难到达。
When do we learn our most important skills - the sand box or the ivory tower?
我们何时学会了最重要的技能——生活中还是象牙塔内？
Success is the most desirable thing, and everyone wants it, especially for those students who just gradate from ivory tower.
成功是件好事，每个人都渴望成功，尤其对那些刚刚从象牙塔毕业的大学生。

We are going to bridge Ivory tower and Main Street, and show the science and also the danger behind that belief.
我们将连通象牙塔和主街，说明那个信仰背后的科学和危险。
哈佛公开课 - 幸福课课程节选
The explicit mandate of positive psychology as well as of this class is to create a bridge between Ivory tower and mainstreet.
积极心理学及本课程的宗旨非常明确,就是要在象牙塔及大众间构建桥梁。
哈佛公开课 - 幸福课课程节选
And it's up to you,to take responsibility, to bridge the Ivory tower and Main Street.
能否搭起学校与社会的桥梁，取决于我们自己。
哈佛公开课 - 幸福课课程节选

The folks at Wharton should leave the Ivory tower and get out into the real world.
FORBES: Why is so Little Money Invested in Index Funds

To live or be in an ivory tower is not to know about or to want to avoid the ordinary and unpleasant things that happen in people's lives.

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.