At older lake sites, there's fossil remains from hippopotamuses, water buffalo, animals that spend much of their lives standing in water, and also, fossils of cattle.
在较老的湖泊遗址，有河马、水牛的化石遗迹，这些动物一生中大部分时间都站在水里，还有牛的化石。
2
Baby hippopotamuses are born on land.
小犀牛在陆地上出生。
3
Hippopotamuses like to stand in the grass and eat most of the day.