As the land flattens out 由于地势平坦

97. the otters will actively harass these great reptiles.
    反而会主动骚扰这些大块头的爬行动物
98. Team play wins the day.
    群体作战通常会取得胜利
99. The Mara river, snaking across the plains of East Africa.
    马拉河蜿蜒地穿过东非平原
100. As the land flattens out
     由于地势平坦
101. rivers slow down and lose their destructive power.
     河水流速变慢 没有了原来的破坏力
102. Now they are carrying heavy loads of sediment
     河流中带着大量的泥沙
103. that stains their waters brown.
     水变得很浑浊

来自《行星地球 第一季 第三集 Planet Earth S01E03 淡水》第 100 行