由于冰片融化，海洋水位增加，位于南亚和埃及的人口密集的河流三角洲以及一些小岛国，面临的危险最大。
As the oceans swell with water from melting ice sheets, it is the crowded river deltas in southern Asia and Egypt, along with small island nations, that are most at risk.
一半以上的三角洲处在同一个高度位置，就像标识出了一个巨大海洋的边界线。
More than half were at the same altitude and appeared to mark the boundaries of a massive ocean.
例如，在有些地区，河流三角洲将有机物质和溶解的微量元素注入海洋，目前还不清楚所有这些错综复杂的相关进程将如何影响水的化学性能。
In areas where river deltas inject organic material and dissolved trace elements into the sea, for instance, it's not clear how all of the intricately related processes will affect water chemistry.
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