科学家已经发现气候变化会引发周期性的强降水与随后断续的干旱天气。
Scientists have found that climate change can trigger periods of intense rainfall followed by long spells of dry weather.
气候降水是该区水资源的主要来源之一，也是影响该区水资源周期性变化的主要因素之一。
Climate rainfall is not only one of main sources of water resources, but also one of major factors affecting periodic change of water resources over this region.
当地降水量的多年周期性变化决定了地下水位的多年动态。
The dynamic variations of groundwater level are subject to cyclic variation of precipitations.
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