productivities
n.
生产率，生产力( productivity的名词复数 );
例句:
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Almost all variations in living standards are explained by differences in countries'productivities.
几乎全部的生活水平的不同都可以由生产率的不同来解释.
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Global warming affects productivities of plants, and then, the structure and evolution of community.
气候变暖影响植物生产力, 进而影响群落的结构和演化.