nub
英 [nʌb]
美[nʌb]
	    - n. 要点;小块,结节;瘤;残根
 
英英释意
- 1. a small lump or protuberance
 
- 2. a small piece;
 - "a nub of coal"
 - "a stub of a pencil"
 
- 3. the choicest or most essential or most vital part of some idea or experience;
 - "the gist of the prosecutor's argument"
 - "the heart and soul of the Republican Party"
 - "the nub of the story"