The classrooms are cleaned every evening by the janitorial staff.

教室每晚都由清洁人员打扫。

A Mac engineer grabbed him and pointed him to a janitorial closet.

Mac的一名工程师抓起他，指了指清洁间。

Besides attending class, you will help our janitorial staff after school.

除了正常上课以外, 下课后你得帮助学校的工人做做义工.

The accommodation will be cleaned 2-3 times every week by janitorial staff.

宿舍每星期更换2~3次备品，并有清洁人员清扫宿舍环境。

The accommodation will be cleaned 2 - 3 times every week by janitorial staff.

宿舍每星期更换2~3次备品,并有清洁人员清扫宿舍环境.