was a towering wall of ice. 只有一堵高耸的冰墙

140. In North America, the meltwater formed an enormous glacial lake
     在北美 融水形成一个巨大的冰川湖
141. 600 meters deep and covering 10,000 square kilometers.
     深达600米 面♥积♥达一万平方公里
142. The only thing stopping the water from flooding the land to the west
     阻止水流向西淹没陆地的
143. was a towering wall of ice.
     只有一堵高耸的冰墙
144. On the far side, the wall was almost a kilometer high...
     在远端 这堵墙有近1000米高
145. ...a seemingly unstoppable barrier...
     似乎坚不可摧的屏障
146. but not for much longer.
     但坚持不了多久

来自《我们星球上的生命 第一季 第八集 Life on Our Planet S01E08 冰与火的世纪》第 143 行