Most rivers drain into the sea, 大部分河流都汇入大海

117. To surprise their prey
     为了突袭猎物
118. crocodiles must strike with lightning speed.
     鳄鱼必须以闪电般的速度出击
119. Here, only the narrowest line separates life from death.
     在这里 生与死只有一线之隔
120. Most rivers drain into the sea,
     大部分河流都汇入大海
121. but some end their journey in vast lakes.
     可有些河流的终点却是大型湖泊
122. Worldwide lakes hold twenty times more fresh water than all the rivers.
     全球湖泊淡水储量比江河多20倍
123. The East African Rift Valley holds three of the world's largest:
     东非大裂谷内有着3个世界上最大的淡水湖

来自《行星地球 第一季 第三集 Planet Earth S01E03 淡水》第 120 行