The rainfall measurements are from the Multisatellite Precipitation Analysis, which is based on data from the Tropical Rainfall Measuring Mission (TRMM) satellite.
对降雨量的统计来自多卫星降水分析，基于TRMM（ Tropical Rainfall Measuring Mission 热带降雨测量任务）卫星的数据。
A 5 to 10 percent drop in rainfall in southwestern North America, southern Africa and the Mediterranean, among other precipitation changes.
北美洲的西南地区、非洲南部和地中海地区降雨量会减少百分之五到十，其他地域的降雨量也会有所变化。
To gauge precipitation, they looked at tree ring widths in lower-elevation oaks, which grow faster in years with higher levels of rainfall.
而为了测定降水量，他们则对长在低海拔地区的栎树的年轮宽度进行研究，因为这些树在雨水比较充沛的年份长得更快。
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