That's because very large animals have a slowrate of reproduction, so all you have to do is remove a few young females from the herd, and you can, fairly quickly, significantly reduce the population.
那是因为大型生物的繁殖速度十分缓慢,所以只要除去象群中的几头年轻的母象,它们的数量就会大幅的下降。
2
It has now started to decline slowly, andis likely to continue to fall at a slowrate.
其现在已经开始下降,并且有可能继续慢速下降。
3
Pillow lavas form when molten rock is pushed up onto the seafloor at a very slowrate.