chromogenic agent的用法和樣例：
例句
- In this paper a brief review is presented on a number of spectroscopic analytical reagents and especially polymeric chromogenic reagents.
本文介紹若干種光學分析試劑尤其是高分子顯色劑的研究進展。 - The dichroic agent is polymetric iodine formed by impregnating an intially transparent plastic sheet of polyvinyl alcohol with iodine and heating.
其二向色劑是聚合磺，它是將透明的聚己烯醇塑料薄片在磺內浸漬后加熱製成的。
