The ability of a material to unite with oxygen is a chemical property. 一个物质和氧化合的能力是一种化学性质。
A numerical measure of a physical or chemical property that is constant for a system under specified conditions such as the coefficient of friction. 系数，率物理或化学性质的数值度量，在规定条件下对于一个系统来说它是常量，例如摩擦系数。
