他们接着说：“像这将的凹形屋顶即使是在雨量非常小的情况下也能够在雨水蒸发之前使雨水从屋顶流下来，最终凝聚成较大的水流收集起来”。
"A concave roof like this will help make even the smallest quantities of rain flow off the roof and eventually coalesce into bigger drops just right for harvesting before they evaporate, " they added.
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