而且，科学家们发现这些石膏具有独特的成分和结构，这表明它们曾经形成于沙漠的低洼地带。
Furthermore, the gypsum was found to possess peculiarities of composition and structure that suggested it had formed on desert flats.
有关官员说，一些低洼地带可能会被水淹没，特别是出现风暴潮的时候。
Officials say they expect flooding in some low-lying areas, especially as storm surges form.
她的相片，绝大多数取材于充满了西班牙情调的哈莱姆河于东河低洼地带。
Her pictures were mostly of Spanish Harlem and the Lower East Side.
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