一句英语,有关语法不太懂

题目

一句英语,有关语法不太懂
most people firmly believe that university is the ivory tower where we enrich knowledge ,improve our observations and learn methods.
这句话中,enrich knowledge ,这么说不就成了“我们丰富知识”了吗,我觉得应该说“enrich us with knowledge",

答案

这里有个固定搭配
enrich one's knowledge and broaden one's mind
一般两者连用