马依娜的回答：

day by day 词性及解释 逐日 Day by day she grows stronger. 她一天比一天好起来。 Day by day the structure heightened. 建筑物逐日增高。 The day dragged by. 这一天慢慢挨了过去。 Day by day, she puts on weight. 她一天比一天发胖。 It is getting warmer day by day. 天气一天比一天暖和了。 He market is becoming brisker day by day. 市场日趋繁荣。

陈岩的回答：

day by day (日复一日) Day by day she learnt more about her job. 她日益了解自己的工作了.

没时间的回答：

日复一日