floater

When the receptionist called in sick, the manager sent a floater from the accounting team to answer the phones.

当接待员请病假时，经理派了一名来自会计团队的临时调派员工来接听电话。

The hotel hires a few floaters during the summer so that any department can get extra help when it is busy.

这家酒店在夏季会雇用几名机动员工，以便任何部门繁忙时都能获得额外帮助。

She worked as a floater in the hospital, covering different wards whenever a nurse was absent.

她曾在医院做机动员工，每当有护士缺勤时就去不同病房顶班。