常見例句雙語(yǔ)例句The Upper Triassic Formation is sub-abysmal basinal facies deposit in the south and north depressions. A black shale layer developed.上三疊統(tǒng)在南、北坳陷為次深海盆地相沉積，發(fā)育一套黑色頁(yè)巖烴源層； 返回 abysmal deposit