staff有单复数么？能不能用a new staff

可以用a new staff
根据字典翻译：
staff解释为
1. a group of persons, as employees, charged with carrying out the work of an establishment or executing some undertaking.
2. a member of a staff.

注意第2个解释

集体名词,没有复数形式

可以用a new staff,一般的新员工用 newcomer 或者freshman

buneng