Dreye權威釋義|nitty-gritty

n.

【俚】（問題的）核心；基本的事實；本質
I like doing business with people who get right to the nitty-gritty.
我喜歡跟那種直截了當，一針見血的人做生意。
Our two sides have agreed to cooperate from now on. Let's get down to the nitty-gritties.
我們雙方都已同意以後要合作，現在讓我們談一下重要的細節吧。

同義參見:

以上來源於：《英漢大辭典》

n.

(the nitty-gritty) informal the most important aspects or practical details of a matter.

1960s: of unknown origin.

以上來源於：《簡明牛津英語詞典》