1. That''s the nub of it.
    关键就在这里。

1. 小块：nuance 细微差别 | nub 小块 | nubbin 小瘤

2. 芬吉：NRM;诺曼底;;;;;;X | NUB;芬吉;;;;;;X | ODH;奥德;;;;;;X

3. 要点;核心：Milestone: 里程碑 | Nub: 要点;核心 | Affect: 影响

4. 国内后向建立不成功消息类信令：NCB:国内呼叫监视消息类信令 | NUB:国内后向建立不成功消息类信令 | NAM:国内地区使用消息类信令

1. (局势、问题或争论的)要害，核心，要点
    The nub of a situation, problem, or argument is the central and most basic part of it.

nub的反义词

    e.g. That, I think, is the nub of the problem...
           我想那才是问题的要害。
    e.g. Here we reach the nub of the argument.
           现在我们谈到了争论的核心部分。

1. the choicest or most essential or most vital part of some idea or experience

    e.g. the gist of the prosecutor''s argument
           the heart and soul of the Republican Party
           the nub of the story

    Synonym: kernelsubstancecorecentercentreessencegistheartheart and soulinwardnessmarrowmeatpithsumnitty-gritty

2. a small piece

    e.g. a nub of coal
           a stub of a pencil

    Synonym: stub

3. a small lump or protuberance

    Synonym: nubble