A: Of course this topic is very broad in scope, but my greatest motive was simply interest--I'm interested in seafaring, economics, history and geography, so naturally I collect materials on these subjects.
答：這個題目當然牽涉甚廣，但「興趣」是最大的原動力，我個人對航海、經濟、歷史、地理感興趣，自然就會去蒐集這方面資料。