What day is today?
今天周几？
What day was yesterday?
昨天周几？
What day will be tomorrow? （这里最容易混淆的就是时态，绝大多数人都会问what day is tomorrow?其实正确的用法是What day will be tomorrow?）
明天周几？
There are seven days in a week.
一周有七天。
From Monday to Friday are the weekdays.
周一到周五是工作日。
We call Saturday and Sunday the weekend.
周六和周日是周末。
There are 24 hours in a day.
一天有24小时。
hour hand 时针
minute hand 分针
second hand 秒针
One hour is 60 minutes.
一小时是60分钟。
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