基本解释深海相英汉例句双语例句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；abysmal facies更多例句