Since capital goods and labor are highly heterogeneous (i.e., they have different characteristics that pertain to physical productivity), economic calculation requires a common basis for comparison for all forms of capital and labour.
自从资本财物及劳力高度多样化（就是说他们有关于物质生产力的不同的特性）以来，经济计算要求对资本及劳力的所有形式的比较的共同基础。