productivities例句

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.

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.