the nitty-gritty informal DETAILthe basic and practical facts of a subject or activity 基本内容；实质性部分 Let’s get down to the nitty-gritty and work out the costs. 我们来谈谈实质性问题，把成本计算出来吧。
the nitty-gritty• Kennedy immersed himself in the nitty-gritty details of the prosecutions.• You've got to get down to the nitty-gritty: how the stage will look, what the lighting will be like, and who designs the costumes.
→ the nitty-gritty at nitty-gritty(1)