day by day, day after day

• it's getting colder day by day.
  天氣一天天冷了起來。
• the boy is getting better day by day.
  那孩子一天天好了起來。

• day after day went by, and still no message arrived.
  日子一天天過去，仍然杳無音訊。
• i have to do the work day after day.
  我得天天做這項工作。

形容詞 day after day:

1. occurring or done each day
   同義詞：daily, day-to-day, day-after-day, every day

副詞 day after day:

1. for an indefinite number of successive days
   同義詞：day in day out

1. Day after day, the scientists worked hard in the laboratory.
   那些科學家們日復一日在實驗室中努力工作著。
2. Day after day she wanders on until at length on the high, chalky table-lands.
   一天又一天，她漫無目標地流浪，最后來到一個白堊高地。
3. Day after day she waited in vain for him to telephone her.
   日復一日，她徒勞地等待他的電話。