Definition
Anything that can be exploited or used to one's advantage or benefit.
可资利用之物（事）
He sees every challenge as grist to the mill, learning and growing from each one.
他將每個挑戰視為磨坊的穀物，從中學習並成長。
For someone keen on gathering information, any news report is grist to the mill.
對於熱衷於收集資訊的人來說，任何新聞報導都是磨坊的穀物。
She treated each setback as grist to the mill, using the experience to inform future projects.
她將每個挫折視為磨坊的穀物，利用這些經驗來為未來的項目提供參考。