a glutton for punishment

1. 随时愿意做苦差事的人

She kept coming to work even when she was ill: she's a real glutton for punishment.

即使病了她仍继续工作, 她真是不怕吃苦。

a glutton for work

1. 工作狂

He's a glutton for work.

他是个工作狂。