It's very difficult to demote somebody who has been filling in during maternity leave.

给替代歇产假的人降职是很难的。

《柯林斯英汉双解大词典》

It is illegal to demote an employee without reason.

无缘无故将一名员工降级是违法的。

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"We are going to demote the PC to just be a device," Steve Jobs said.

“我们打算把PC贬为仅是设备”，乔布斯说。

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Robinson took the decision to demote Ally Hogg to vice-captain after Blair's impressive leadership on Scotland duty.

BBC: Scots can build on good work

Likewise, your manager might give you a test challenge to reconfirm her decision to demote or fire you.

FORBES: What To Do When They Radically Change Your Job

Terry, who has been replaced by fellow defender Rio Ferdinand, said he abided by Capello's decision to demote him.

BBC: John Terry stripped of England captaincy by Capello