and global temperatures began to rise. 全球温度开始上升

134. But just as life got used to colder, drier conditions,
     但就在生命逐渐适应 更寒冷、更干燥的条件时
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

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 137 行