设计洪水计算方法主要是可能最大降雨和水文频率法。
The main methods for calculating designed flood are probable maximum precipitation and hydrologic frequency analysis.
去年夏天是有记录以来降雨量最大的。
不仅是全球主要温室气体二氧化碳最大的储藏所之一，也是整个南美洲的降雨工厂，还可以算得上全球气候举足轻重的调节者。
It is one of the world's biggest reservoirs of carbon dioxide, the principal greenhouse gas, as well as a rain factory for all of South America and, possibly, a vital regulator of the world's weather.
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