pith
英 [pɪθ]
美[pɪθ]
	    - n. 精髓;核心;骨髓;要旨
 - vt. 杀死;使瘫痪;除去…中的髓
 
英英释意
- 1. soft spongelike central cylinder of the stems of most flowering plants
 
- 2. 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"