银河漫步VR:day in day是什么意思

没有day in day的用法，应该是day in 、day to day或day by day.

day to day: a. 每天的
例句与用法:
1. Pretty tough day to day.
日子不好过啊。
2. She has been taking exercises to lose weight from day to day.
她每天锻炼来减肥。
3. We muddle along from day to day.
我们一天天地混日子.
4. Things change from day to day.
事情一天一变.

day by day: n. 一天天
例句与用法:
1. It is getting warmer day by day.
天气一天天暖和起来。
2. The patient's condition is improving day by day.
病人的病情逐日好转。
3. Day by day she learnt more about her job.
她日益了解自己的工作了.
4. Repulse after repulse failed to deter Alec, who persisted day by day, at first with a marriage license and holy words.
苔丝一次又一次的严辞拒绝未能制止亚历克，他整天缠住苔丝，先是用结婚证书和神圣的誓言来说服她。

day in: n. 一天到晚(一天又一天)
1. She wears sandals every day in summer.
夏天她每天都穿凉鞋。
2. We are hoping to go for a day in the country if the weather's fine tomorrow.
如果明天天气好，我们打算到郊外去玩一天。
3. She was out all day in the rain and this brought on a bad cold.
她整天在外淋雨, 因此患了感冒。
4. A day in jail cooled him off.
一天的铁窗生活使他冷静了下来。
5. Day in, day out, no matter what the weather is like, she walks ten miles.
她不管天气如何，每天总是不间断地步行十英里。

a day-a day
一天一天
双语对照
例句:
1.
An apple a day keep a doctor away.an onion a day keep everyone away.
一天一个苹果医生离你远一天一个洋葱人人离开你。

day after day或者day by day是日复一日, day in day 没有这种说法

一天天地(有程度加深的意味)

一天天地，逐渐

日复一日

日复一日