基本解释深海沉积物；深海堆积英汉例句双语例句The Upper Triassic Formation is sub-abysmal basinal facies deposit in the south and north depressions. A black shale layer developed.上三叠统在南、北坳陷为次深海盆地相沉积，发育一套黑色页岩烃源层；专业释义化学深海沉积物土木建筑工程深海沉积