2 sentences

1. 他日复一日地重复着同样的工作。

   tā rì​fù​yī​rì de chóng​fù zhe tóng​yàng de gōng​zuò.

   He repeats the same work day after day.

   Source: Dong Chinese Dictionary

2. 那只狗日复一日地等待着主人的归来。

   nà zhī gǒu rì​fù​yī​rì de děng​dài zhe zhǔ​rén de guī​lái.

   The dog waited day after day for its master's return.

   Source: Tatoeba