grist for the mill
US /ɡrɪst fɔr ðə mɪl/
UK /ɡrɪst fɔr ðə mɪl/

1.
磨坊的穀物, 有用的素材
something that can be used to your advantage or to support an argument or cause
:
•
All the criticism he received was just grist for the mill, making him work even harder.
他所受到的所有批評都只是磨坊的穀物,讓他更加努力工作。
•
The politician used the recent scandal as grist for the mill in his campaign speech.
這位政治家利用最近的醜聞作為他競選演說的素材。