天长日久，即形成踩鼓节的定俗。

Namely, the formation of foot drum set custom section.

天长日久，我便害了一种迷恋时髦服装的相思病。

As time went by, a lovesickness of fashionable clothes came into me.

天长日久，锡矿挖完了，“有锡”便改成了“无锡”。

As time passed by the tin mine ran out and "Youxi" was changed to "Wuxi".

读你需要的书，读你喜欢的书，读圣贤之书，天长日久，滴水石穿，你的书卷之气会不请自来。

Please read what you need, what you like and the books of saints. After a considerable period of time, constant dripping wears away the stone.