component part
(组合)零件, 部件, (组)成(部)分
例句与用法：
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
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。
Brimstone is a component part of explosive.
硫磺是炸药的一种组成成分。