The spatial distribution of the concentrations of COD in water and sediment of surface layer shows a decreasing trend from the northwest and middle waters to the estuary of the bay.
海水与表层沉积物COD含量平面分布总的呈西北部水域和湾中部水域向湾口降低的趋势。
The explosion lifted about 100 trillion tons of dust into the atmosphere, as can be determined by measuring the thickness of the sediment layer formed when this dust settled to the surface.
这次爆炸将大约100万亿吨的尘埃提升到大气中，这一数字可以通过测量这些尘埃降落到地表时所形成的沉积层的厚度来确定。
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