的了解

knowledge of

→ 的
phrase Rare #25,441
knowledge of Follows a topic or subject to mean knowledge or understanding of it, as in 对……的了解 (“knowledge of…”).
CH: 我对这座城市的了解还不够。
EN: I don't know enough about this city yet.

你对生意的了解真是惊人,尤其考虑到你的年纪。

Your knowledge of business is truly impressive, especially considering your age.