用英语简单介绍东非动物迁徙

From July to September each year, several millions of wild animals in EastAfrica will migrate from Tanzania to Kenya, known as a global natural wonder.
On the vast open plains of the Serengeti and deep into the rolling hills of the Masai Mara the largest animal herds on the planet move in a never-ending natural pattern in response to an undeniable imperative - the need to find fresh, nourishing grazing. This exceptional natural phenomenon is renowned as Africa’s greatest wildlife spectacle. The thundering hooves of the herds and the enormous clouds of fine red dust they leave in their wake have become an icon of East African safari.