Carol managed a few proper snivels for the sake of appearance.为了做做样子，卡萝尔适时地抽了几下鼻子。She called on us merely for the sake of courtesy.她来访只是为了礼貌.For the sake of our friendship after years, do me this honour!看在咱哥俩多年的情分上, 你就赏个...
Glauconite, detrital carbonate skeletal debris, marine fossils, and collophane are commonly present.海绿石 、 碳酸盐骨骸碎屑 、 海相化石和胶磷矿普遍出现.Glauconite, hematite - limonite and some chlorite are formed in syndiagenesis.形成于同生成岩期的自生矿物...