So air currents powered by the sun 至此 由太阳驱动的大气环流

225. As the air rises, so it cools.
     随着气流的上升 温度也逐渐下降
226. The water it carries condenses into clouds
     携带的水气开始凝结 汇集成云
227. and then falls as the life giving rains of the monsoon.
     然后变成季风雨落到地面 滋润大地万物
228. So air currents powered by the sun
     至此 由太阳驱动的大气环流
229. carry wet air to the middle of continents.
     将潮湿空气带到了大陆中部
230. Without water there can be no life,
     没有水就没有生命
231. but its distribution over the land is far from even.
     不过 水在陆地上的分配极不平均

来自《行星地球 第一季 第一集 Planet Earth S01E01 从北极到南极》第 228 行