就在我们远眺处的下方，黝黑的沟状脊代表了另外一种50万年的沉积层，更远处铺满了玄武岩，520万年前，这块巨大的平原被淹没在火山岩浆之中。
Below us dark, gullied ridges held another half million years of sediments. Beyond them was the basalt, laid down when this vast plain was swamped in lava, 5.2 million years ago.
洪水已经淹没了泰国的中部平原地带并继续向首都曼谷蔓延，曼谷地区经济总量占全国的40%。
Floodwaters that had already submerged Thailand’s central plains moved towards Bangkok, the nation’s capital and home to 40% of the country’s economy.
许多平原地区当内湖因地下水位上升而溢满时可能也会发现它们被水淹没。
Many plains regions may find themselves also flooded as interior lakes fill up due to rising water tables under the land.
的庄稼收成是依赖被洪水冲走量的多少，粗略估计，每十年泛滥平原就会被淹没一次。
Harvest from the flood plain depends on the magnitude of the river's runoff during the flood period. Roughly once in ten years the entire flood plain would be submerged.
对于平原灌区，研究利用以淹没出流为主的工作闸门进行渠道量水具有现实意义。
It has realistic significance to research on using working gate with submerged discharge to measure water in canal for slab irrigation district.
对于平原灌区，研究利用以淹没出流为主的工作闸门进行渠道量水具有现实意义。
It has realistic significance to research on using working gate with submerged discharge to measure water in canal for slab irrigation district.
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