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The nitty-gritty is the real, practical heart of a job or a problem — the facts you have to deal with, not the nice talk around them.
The nitty-grittyNitty-gritty is是 the real, practical heart of a job or a problem一件事或一個問題最實際的核心 the facts you have to deal with你非面對不可的事實 not the nice talk around them而不是周圍那些好聽的話
We often say get down to the nitty-gritty, meaning stop going round the subject and talk about what we actually have to do, what it will cost, or how it will work. It is informal and a little rough in a friendly way. You can also use it like an adjective: the nitty-gritty details.
We often say get down to the nitty-gritty我們常說get down to the nitty-gritty meaning stop going round the subject意思是別再繞圈子 and talk about what we actually have to do, what it will cost, or how it will work直接談要做什麼、要花多少錢、要怎麼運作 It is informal and a little rough in a friendly way這個說法很口語，帶點粗獷但很親切 You can also use it like an adjective它也可以當形容詞用 the nitty-gritty details像是the nitty-gritty details（真正重要的細節）
Nobody is completely sure where it came from. People say Black jazz musicians in the United States used it first. It may be a playful twist on gritty, as in rough like grit, with the first half changed so the two halves sound alike.
Nobody is completely sure where it came from沒有人完全確定這個詞是從哪裡來的 People say Black jazz musicians in the United States used it first有人說是美國的黑人爵士樂手最先用的 It may be a playful twist on gritty它可能是從gritty（像沙粒一樣粗糙）玩出來的變化 as in rough like grit意思是像沙一樣粗 with the first half changed so the two halves sound alike前半部改了一下，讓兩半聽起來押韻
Though actually, there is a grim story some people repeat: that it named the dirt left in slave ships. There is no evidence for that, and the word does not show up early enough in writing to belong to that time. A tidy answer would hide the story; I would rather say it is a story, and a false one.
Though actually不過其實 there is a grim story some people repeat有人會講一個沉重的說法 that it named the dirt left in slave ships說這個詞是在講奴隸船裡留下的髒污 There is no evidence for that這個說法沒有證據 and the word does not show up early enough in writing to belong to that time而且這個詞在文獻裡出現的時間也不夠早，不屬於那個年代 A tidy answer would hide the story給一個乾淨俐落的答案會把這段故事藏起來 I would rather say it is a story, and a false one我寧願說清楚：這是個故事，而且是假的
組成Origin uncertain. Said to have been first used by Black jazz musicians in the United States; perhaps a playful repeat of gritty (“like grit”), with the first half changed. A story tying it to slave ships has no evidence, and the word is not recorded early enough for that.
原始詞典資料2 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
nitty-grittynoun/ˌnɪtiˈɡɹɪti/
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The core or essence of something; the gist.
- He gave a short summary without getting into the nitty-gritty of the problem.
nitty-grittyadj/ˌnɪtiˈɡɹɪti/
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Dealing with something in great depth.
- 1976, United States. National Commission on Arthritis and Related Musculoskeletal Diseases, Arthritis - Out of the Maze We deal with them at a very, very nitty gritty level, and we deal with the results of years and years of problems that they've had in the past.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。