We can do that by intercepting our observation with the date base and knowledge we required, the whole color map.

通过截取我的观察结果,分析数据库，所需的知识，以及整个彩色图画。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

They are really a difficult concept to grasp when you have no base knowledge of it.

当你没有基础知识时，冠词确实很难掌握。

韩国人经常犯的失误 - SpeakingMax英语口语达人