因为这4个站具有相同的气候背景，降水量的年、季、月变化呈现基本一致的规律和趋势，但因为海拔高度不同等气候背景的差异，4站的降水特点又显著不同。
The beginning and end dates of the rainy season changes every year. The patterns of the rainfall changes at the 4 stations are same due to the same climate.
因为这4个站具有相同的气候背景，降水量的年、季、月变化呈现基本一致的规律和趋势，但因为海拔高度不同等气候背景的差异，4站的降水特点又显著不同。
The beginning and end dates of the rainy season changes every year. The patterns of the rainfall changes at the 4 stations are same due to the same climate.
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