比重bǐzhòng 1.物质的重量和4℃时同体积纯水的重量的比值,叫做该物质的比重。{specific gravity; ratio of the weight of a given volume of a substance to that of the same volume of pure water at 4℃} 2.一种事物在整体中所占的分量{proportion; amount of sth. in its entirety}: 我国工业在整个国民经济中的～逐年增长。{The proportion of industry as a whole within the national economy is growing year by year.}