But I soon became struck by the sheer volume of both observation and investigation he has done in many different sports,and I felt persuaded that what he had to say would be of real interest.给断了一...我觉得根据你的翻译在稍微改动一下“他曾在不同的体育运动上做的大量的观察研究和调查研究使我印象很深，我对他已经说过的话感兴趣。”