1.know about 知道,了解
Here are a few facets you might not know about.
但有些事情你可能未必知道。
Everything I know about it I picked up from the same sources you did.
對于該動向,我了解信息的渠道與各位完全一樣。
2.heard about 聽說
Most heard about 1989 from their parents or high school teachers.
多數人都從自己的父母或高中老師那里聽說過1989年的事件。
We've all heard about antioxidants as cancer fighters.
我們都聽到過抗氧化劑是抗癌斗士的說法。