他们在凿井的过程中,发现了一处稀有矿物矿床.In course of sinking the well - shaft they came upon a deposit of a very rare mineral.他被发现死在了电梯井的底部。He was found dead at the bottom of a lift shaft.一颗眼泪由他眼里一直落到了井的深处.A tear rolled from his eye into ...
在许多细胞中,含量最高的磷脂是磷脂酰乙醇胺或脑磷脂.The most abundant phospholipid in many cells is phosphatidyl ethanolamine or cephalin.乙醇胺在气体的纯化和分离方面也是有用的.Ethanolamines are also of value in the purification and the separation of gases.利用不经提纯的棉...