Hiring extra help is as easy as adding a new moderator .
租用额外帮助是那样轻松加入新主持人。
I have created a public group that requires new members to be accepted by an admin or moderator .
我已经创建了一个新成员需要通过一个管理员或仲裁者批准的公开群组。
Rickover eventually settled on a reactor design that economised on space by using water as both moderator and coolant-a pressurised water reactor , or pwr .