【Key words】 biomass; distribution character; Schima superba; population produdtivity;
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Population productivity of prey fish 饵料鱼类的种群生产力
Although population, industrial output and economic productivity have continued to soar in developed nations, the rate at which people withdraw water from aquifers, rivers and lakes has slowed.
尽管发达国家的人口、工业产出和经济生产率还在飙升,但人们从含水层、河流和湖泊取水的速度已经放缓。
Once again when initial productivity gains had been absorbed, the rate of population growth abated.
一旦最初的生产力增长被吸收殆尽,人口的增长再次衰落。
The best way to compensate for an aging population - and therefore fewer workers - is higher productivity.
弥补一个老化人口或缺少劳动力人口的最佳办法是高生产率。
Indeed,volatile food prices, population growth, low agricultural productivity and the potentially devastating effects of climate change make it a particularly daunting challenge. The IFAD president says over the past 30 years, agricultural productivity in developing countries has been stagnant or in decline. He blames it on years of under-investment.
VOA: standard.2010.03.29
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