丹尼尔上完历史课回来，就和爸爸讨论起郑和下西洋的故事。于是父子之间就关于海上探险这个话题展开了讨论，到底怎样呢？来看看吧！ Listen Read Learn Benjamin: Hey, Daniel, how's it going? Daniel: Hey, Daddy, today I had really a fantastic history class. Ben...
