如今在区分新老湖床方面非常重要的另一个不同点在于石灰岩地层的位置。

Another difference, very important today for distinguishing between older lake beds and newer ones, is the location of the limestone formations.

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死亡谷是一片沙漠平原，是加利福尼亚的一个干涸的湖床，四周群山环绕，在沙漠的地面上有巨大的岩石，有些重达数百磅。

Death valley is this desert plain, a dry lake bed in California surrounded by mountains and on the desert floor these huge rocks, some of them hundreds of pounds.

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