by day

中英例句：

1. Day by day she learnt more about her job.
   她日益了解自己的工作了。
2. The fugitives travelled by night andrested by day.
   逃亡者夜行而晝伏。
3. What is done by night appears by day.
   若要人不知除非己莫為。
4. Owls sleep by day and work at night.
   貓頭鷹白天睡覺晚上工作。
5. The patient's condition is improving day by day.
   病人的病情逐日好轉。
6. Owls sleep by day and work by night.
   貓頭鷹白天睡覺晚上工作。
7. You can see stars by night, but not by day.
   你在夜晚可以看到星星，白天卻看不到。
8. Sleeping by day.
   在白天睡覺