And it's in these years after his graduation from college that Milton embarks upon what is essentially a systematic study of all available knowledge. He commands a mastery of just about the entire canon of Western literary and historical learning.

就是在他毕业后的这些年里,弥尔顿开始着手系统的学习,方方面面的知识，他想要精通,整个西方文学和历史经典。

耶鲁公开课 - 弥尔顿课程节选

They symbolize generosity, tolerance, inoffensiveness and mastery of knowledge, embodying the rules of conduct that they advocate for others.

UNESCO: Intangible Cultural Heritage

This requires abundant historical knowledge and mastery of ancient Chinese grammar.

UNESCO: CULTURE

Perhaps more importantly, I also taught that their mastery of this specialized knowledge is only as valuable as their ability to communicate it to patients coming from different cultures, education level, and socioeconomic backgrounds.

FORBES: Pharmaceutical and Science Education Column Relocates to Forbes.com