What do you mean, fishing is poor for three years and photography is ruined for life?

Fishing for three years and photography for a lifetime mean that these two hobbies cost more money. According to relevant public information, fishing and photography are actually a waste of time and money, and many people are addicted to it. The meaning of this sentence is to tell us not to play with things and get discouraged. We can take fishing and photography as a relaxing leisure way, but we should not indulge in it, ignoring our serious career because of our personal hobbies. Young people in particular should devote their time and energy to their studies and careers.