What started as a series of meltwater streams 最初的融水溪流

135. everything changed.
     一切都改变了
136. The ice began to melt as Earth's orbit shifted once more
     随着地球轨道再次发生变化 冰开始融化
137. and global temperatures began to rise.
     全球温度开始上升
138. What started as a series of meltwater streams
     最初的融水溪流
139. soon turned into a deluge.
     很快变成洪水
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

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 138 行