The pampas are still among the most fecund lands in the world.南美大草原仍然是世界上最富饶的土地之一。

Large animals are less fecund than small ones.大型动物不如小型动物繁殖力强。

It has now become clear how extraordinarily fecund a decade was the 1890s.现在可以清楚地看出19世纪90年代是多么超乎寻常、成就斐然的十年。