chemical constituent的用法和樣例：
例句
- The chemical composites of photogelatin for flat screen stenciling are analyzed.
簡要分析了平網製版感光膠的化學組分。 - The purpose of this work is to study systematically the chemical constituents and economical values of various parts in various plants of Paulownia.
本研究課題為系統研究泡桐屬各樹種各部位的化學組分及其經濟價值。
