1. To do this, he must be at least as knowledgeable to as the dealer.
    要做到这一点，他至少要像古董商一样懂行。

2. He was a knowledgeable baseball fan and often took me to Ebbets Field to see the Brooklyn Dodgers play.
    他是一个见多识广的棒球迷，常常带着我到埃贝茨球场观看布鲁克林道奇队队员的比赛。

3. You´re very knowledgeable,so I hope you don´t mind me asking you some more questions.
    你的见识很广,所以我希望你不介意我问你一些问题.