knower

As a knower of local history, she can name every old building in town and the year it was built.

用法提示：knower 是名词，意为“知晓者”，在 as 短语中作宾语，指了解当地历史的人。

He is not just a reader of books; he is a knower who understands the ideas behind them.

用法提示：knower 是名词，意为“知晓者”，在系动词 is 后作表语，who 从句进一步说明其特点。

The goal of science is to turn curious students into careful knowers of the natural world.

用法提示：knowers 是 knower 的复数形式，意为“知晓者们”，在 turn...into... 结构中作介词 into 的宾语，表示转变后的身份。