求助(专业翻译)? < >Suitable triphenylmethanes and the color change which each undergoes upon replacement of amino hydrogen with hydroxyethyl are the triamino triphenyl carbinols pararosaniline hydrochloride and rosaniline hydrochloride and the diamino triphenyl carbinols doebners violet, and the non-alkylated precursor of malachite green. Pararosaniline hydrochloride is the preferred indicating compound. </P> < >请帮忙翻译以上专业文献。<BR ><BR ></P>查看更多3个回答 . 4人已关注