/deɪ/
一天；一日
a period of 24 hours
白天；白昼
the time between sunrise and sunset; daylight
时代；时期（用复数）
a particular period of time; era (often plural)
every day
每天
day after day
日复一日
these days
如今
What day is it today?
今天星期几？
The days are longer in summer.
夏天白天更长。
In my day, there were no smartphones.
在我那个时代，没有智能手机。
上一个
after
下一个
where