Or in response to Russell's "It is important to know that parameter polymorphism is the source of happiness."
Our acquaintance is still shallow, and it took me longer to get along with Zhang Yu, but I still enjoy it.
If you still can't see him today, then think about him carefully in your memories.
I secretly write down what he looked like and what he did at any time, what he said and what I did, it's like replicating the good times doubled.