湘娥化作此幽芳,凌波路,古岸云沙遗恨。临砌影,寒香乱、冻梅藏韵。澹然离言说,悟悦心自足。If productivity measures the efficiency of an economy, a measure of what an economic system produces is its gross national product (GNP), which is the current market value of all final goods and services that a nation produces within a particular period. |