losing their leaves in preparation for the dark cold months ahead. 它们落下树叶 以应对即将到来的几个月的严寒和黑暗

154. The advance of the seasons brings constant change.
     世间万物随着季节的变迁不断改变
155. As the sun's influence diminishes in the north,
     在北方 随着太阳影响力的减弱
156. so the deciduous forests of America begin to shut down
     美洲落叶林开始放慢生命的脚步
157. losing their leaves in preparation for the dark cold months ahead.
     它们落下树叶 以应对即将到来的几个月的严寒和黑暗
158. One season hands over to another.
     一个季节接替另一个季节
159. Some organisms thrive on decay,
     有的生物在腐烂中获得兴盛
160. but most must make special preparations for winter and a life with little sun.
     而更多的却得专门为冬天做好准备 以度过缺少阳光的日子

来自《行星地球 第一季 第一集 Planet Earth S01E01 从北极到南极》第 157 行