The advance of the seasons brings constant change. 世间万物随着季节的变迁不断改变

151. The earth, as it makes its annual journey around the sun,
     地球每年绕着太阳公转
152. spins on a tilted axis.
     同时也绕着一根倾斜的轴自转
153. And it's this tilt that creates the seasons.
     正是这种倾斜造成了季节变化
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

来自《行星地球 第一季 第一集 Planet Earth S01E01 从北极到南极》第 154 行