The negotiation is an art, it needs people have many skills, such as knowledge, mastery, eloquence and demeanor.

谈判是一门艺术，是谈判人员在知识、修养、口才、风度等方面的集中较量。

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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

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

UNESCO: CULTURE

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

UNESCO: Intangible Cultural Heritage

You need not accept Mr Roberts's quixotic interpretations or be moved by his own political agenda to admire his knowledge of the times and his mastery of the documents.

ECONOMIST: British politicians: Just say no | The