The theory of light was, in fact, a subject which I had studied with great interest, and I had formed a definite opinion as to the nature of light.
事实上，光的理论是我非常感兴趣的研究课题，我对光的本质形成了明确的看法。
The eagle never lost so much time as when he submitted to learn of the crow.
梦想不会自己实现，除非你付诸行动。