Translation of "knowledgeable" into Chinese

I consider you the highly knowledgeable professionals dealing in the very delicate area of arms control and disarmament

各位都是军备控制和裁军这个极为微妙的领域知识渊博的专家。

Mary made a cake without her mother's knowledge.

瑪莉不讓母親知道,自己做了一個蛋糕。

I shall miss him, and I shall always remember his combination of knowledgeability, elegance, sincerity and flexibility

我会思念他,将永远铭记他的博识、高雅、认真和通融。