“ivory”是“象牙”的意思，the tower of ivory意思就是“象牙塔”。

【例句】
When just attending a college, be full of the enthusiastic the tower of ivory that comes in this ideal, want to make a career one time!
刚刚上大学的时候，满怀热情的来到这个理想中的象牙塔，想要成就一番事业！

College age still should is in the tower of ivory, also be more Utopian to social understanding.
大学时代应该还算是在象牙塔中，对社会的熟悉也是比较理想化的。