A lustrous, blackish - brown rare earth mineral consisting primarily of cerium , erbium , titanium , uranium, and yttrium.一种红褐色矿物, 含稀土金属, 是钍和铈的主要来源.The titanium ascorbate was the substance of low toxicity to fish, shellf...
People always think I'm a fool, and I dare say they're right.人们总认为我是个傻瓜，想必他们是对的。Don't speak to me like that. Don't you dare.不要那样跟我讲话。我不允许！When found, the children said they'd run away for a dare....
这是由于热液蚀变岩石具有较高的抗风化力的缘故.This is due to the higher weathering resistance of hydrothermally altered rock.反对热液成固的理由是铀和金有着一致的分布.Argument against a hydrothermal origin is the sympathetic distribution of uranium and gold.在所有热液矿...