But the walls of the ivory tower remain formidable.

但突破象牙塔的壁垒依然艰巨。

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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。

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Not because of the ivory tower, only to say I love the world that is the case.

不是因为在象牙塔中，才要说出我爱世界这样的话。

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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

The idea of bridging Ivory tower and Main Street.

也就是，搭起学校与社会之间的桥梁的想法。

哈佛公开课 - 幸福课课程节选

He nowadays would be covered in tar and feathers and chased out of the ivory tower for self-plagiarism?

FORBES: I Am an Academic Fraud

One force behind all this money has been the fall of the ivory tower that once kept professors above real-world concerns.

FORBES: Magazine Article

Zuckerberg lately has gotten the reputation of the billionaire exec in the ivory tower, wearing a hoodie of course.

FORBES: The Bright Side To Facebook's Slide: Mark Zuckerberg Gets Candid