A measure of an economy's total output of goods and services is known as gross national production.

衡量一个经济体的产品和服务的总产出的衡量被称为国民生产总值。

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Poplar and willow forests in Yugoslavia have an area of 150,000 ha, being 1.5% of the national total, but the timber output is 8% of the gross national production.

南斯拉夫共有杨柳树林地15万公顷，仅占森林面积的1.5％，但其木材产量却占全国木材总产量的8％。

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