floater

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

用法提示：此句中 floater 指被临时调派的员工，是可数名词。

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

用法提示：此处 floaters 为复数，指旺季临时调配的多名员工。

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

用法提示：此句中 a floater 表示‘机动人员’，在医疗机构中顶替缺勤岗位。