component part

名词 component part:

1. something determined in relation to something that includes it
   同义词：part, portion, component

1. The study of how words and their component parts combine to form sentences.
   文法学对词以及其组成部分如何结合以形成句子的研究
2. The processing and assemble business is a component part of our foreign trade.
   加工和装配贸易是我国对外贸易的一个组成部分。
3. Brimstone is a component part of explosive.
   硫磺是炸药的一种组成成分。