A week has seven days.

一周有七天。

youdao

I will be hard-working because "for the hard-working, a week has seven days;"

我将努力学习，正如谚语所说 “对于勤奋的人每周有七天；

youdao

The facility, which operates seven days a week from 9 a.m. to 9 p.m., has eight research rooms decorated as living rooms or home offices, with hardwood floors, soft lighting and comfortable furniture.

奥斯汀试验基地工作时间是每周七天上午9点至晚上9点，共有8个研究客房装饰成客厅或家庭办公室的样子-硬木地板，柔和的灯光，舒适的家具。

youdao

He works seven days a week, because he has lots of bills to pay.

VOA: standard.2010.03.15

These included "people who are not prepared to work what has to be shift work, it's a service that has to be delivered seven days a week, 24 hours a day" and people "who are not prepared or who are not able to do the very personal, intimate care that's needed and that's particularly where wages are lower than we would like to pay".

BBC: British workers 'needed on farms'

Specialist Health Services is to take over Priory Avenue Practice in Caversham on 1 May - and has plans to open it seven days a week.

BBC: Group of GPs to take over Caversham surgery

The Chalke Valley Stores, which is due to open in June, has been given permission to trade seven days a week.

BBC: Post office to open in Wiltshire village church