例句與造句

1. This is similar to the synchronous deposition of black shale in europe . during the lower toarcian , coincident with the peak of the lower jurassic transgression , highly bituminous shales were deposited in extensive parts of the european epicontine
   這種有機(jī)碳異常富集的沉積層被描述為大洋缺氧事件（ oae ）的沉積，與白翌紀(jì)賽諾曼十侖期類(lèi)似。
2. It's difficult to find bituminous shale in a sentence. 用bituminous shale造句挺難的