The pampas are still among the most fecund lands in the world.

南美大草原仍然是世界上最肥沃的土地之一。

Large animals are less fecund than small ones.

大动物没有小动物繁殖能力强。

It has now become clear how extraordinarily fecund a decade was the 1890s.

现在已经很清楚 19 世纪 90 年代是多么超乎寻常、成就斐然的 10 年了。