pith

名词 pith:

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
   同义词：kernel, substance, core, center, essence, gist, heart, heart and soul, inwardness, marrow, meat, nub, sum, nitty-gritty

动词 pith:

1. remove the pith from (a plant)

1. That was the pith of his argument.
   那就是他论据的要点。
2. The pith of that theory is serving for people.
   那个理论的精髓是为人民服务。

pith

n.（名词）
Botany The soft, spongelike, central cylinder of the stems of most flowering plants, composed mainly of parenchyma.
【植物学】 （木）髓：许多生花植物树干中心部位中的软似海绵的物质，主要由薄壁组织构成
Zoology The soft inner substance of a feather or hair.
【动物学】 髓质：羽毛或毛发中的软性物质
The essential or central part; the heart or essence.See Synonyms at substance
精髓，要旨，核心：核心部分或中心部分；中心或精髓参见 substance
Strength; vigor; mettle.
力量；精力；勇气
Significance; importance.
意义；重要性
Archaic Spinal cord or bone marrow.
【古语】 脊髓，骨髓
v.tr.（及物动词）
pithed,pith.ing,piths
To remove the pith from (a plant stem).
去髓：从（植物茎）中提取髓
To sever or destroy the spinal cord of, usually by means of a needle inserted into the vertebral canal.
破坏脊髓：刺或破坏其脊髓，通常用一根针扎进脊柱中
To kill (cattle) by cutting the spinal cord.
杀牛：用将脊柱砍断的方法杀（牛等）

来源：
Middle English
中古英语
from Old English pitha
源自 古英语 pitha