只有持证人员才能进入这个区域。

Only licensed ___persons are allowed to enter this area.

每个参与项目的人员都必须签署保密协议。

All ___persons working on the project must sign a confidentiality agreement.

紧急出口仅限人员使用，不得存放货物。

Emergency exits are for ___persons only, not for storing goods.