This hobby educates one not only in the chosen subject, but also in general matters which have some bearing on it.
这种爱好不仅能使人从选择的专题中受到教育,而且也能从与之有关的一般事物中获得长进。
——《新概念英语》
In this way self-confidence grows, first from mastering a subject, then from being able to talk about it.
这样,你自信心不断增强,先是因为掌握了一门学问,接下来是因为能够就此发表见解。
——《新概念英语》