例句與造句

1. manufacturer of industrial and intermediate chemicals in china . main products include gallic acid and pyrogallic acid, trihydroxybenzoic acid and derivatives, and tannins
   -主要生產有機胺產品系列氯堿產品系列工業(yè)硅等產品的國家大二型企業(yè)。
2. It's difficult to find pyrogallic acids in a sentence. 用pyrogallic acids造句挺難的