单词 param 释义 param Chem.|prm|[f. para-1 2 + amide.]A synonym of dicyanodiamide, C2N2 (NH2)2, a white crystalline compound, a polymer of cyanamide.1866–77Watts Dict. Chem. IV. 350 Cyanamide changes into param when left to itself for a long time.1877Fo...