Your few four-legged ancestors, the tetrapods, struggled in tropical river plains.

你的少数四足祖先， 四足动物，在热带河流平原上挣扎。

By the time he'd descended onto the river plain the sky to the east carried the first faint wash of light.

当他降落到河边平原时， 东方的天空出现了第一缕微弱的光芒。

So the floods in Nigeria were really the most devastating in the country’s history -- and particularly affected the populated areas of the vast river plains of the Benue and Niger, destroying houses, bridges, farmland, killing numerous cattle.”

因此，尼日利亚的洪水确实是该国历史上最具破坏性的洪水——特别是影响了贝努埃河和尼日尔广阔河流平原的人口稠密地区，摧毁了房屋、桥梁、农田，杀死了无数牛。”