Photo Gallery: Azurite crystals from Arizona seem to pulse with color.矿物的图片集.蓝铜矿的结晶来自亚利桑那州好像添加彩色.Azurite's brilliant color adds to its popularity in creating semiprecious stones.兰铜矿灿烂的色彩加上它的声望造成准宝石的宝石.Limited compan...
Cholera is a bacterial infection.霍乱是一种细菌感染。Bacterial reproduction is accelerated in weightless space.在失重的空间,细菌繁殖加快了.Brain lesions can be caused by bacterial infections.大脑损伤可能由细菌感染引起....