dossier|dossiers

人事部门为每位员工都建立了一份个人档案。

The HR department keeps a ___dossier on every employee.

人事部门为每位员工建立了个人档案。

The HR department keeps ___dossiers for every employee.

警方正在整理关于这起案件的详细档案。

The police are organizing a detailed ___dossier about this case.