That's because very large animals have a slow rate 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。

youdao

It has now started to decline slowly, andis likely to continue to fall at a slow rate.

其现在已经开始下降，并且有可能继续慢速下降。

youdao

Pillow lavas form when molten rock is pushed up onto the seafloor at a very slow rate.

枕状熔岩是岩浆被缓缓推积至海底时形成的。

youdao

Experts say job losses might slow later this year, but the unemployment rate could rise until the middle of next year.

VOA: special.2009.05.29

We expect profits to rise at a slow rate, but the discount rate to also rise.

FORBES: A Record Stock Market with Record Federal Debt: Does This Make Sense?

However, we expect the payment size to increase going forward at a slow rate.

FORBES: Higher Paypal Payments A Benefit For EBay

Ms Lucas says she doesn't get depressed about the slow rate of progress but "impatient".

BBC: Green Party leader calls for thriving green economy