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Good news for soda lovers: Scientists appear to be one step closer to being able to regenerate teeth in humans. A study in Developmental Biology explains how sharks and other marine life are able to regrow teeth continuously throughout their lives. 告诉碳酸饮料爱好者一个好消息：科学家向人类牙齿再生技术又迈进了一步。《发育生物学》上刊登了一项研究，向我们解释了鲨鱼及其它海洋生物可以终生不断再生牙齿的原理。 Until now, that process had been “poorly understood and [remained] virtually uncharacterized from a developmental genetic standpoint.” Researchers at the University of Sheffield studying the embryos of catsharks discovered a “special set of epithelial cells” called dental lamina that are responsible for regenerating teeth, according to a press release. 人们此前对鲨鱼牙齿的再生过程“了解甚少”，认为它“一直是发育遗传理论中的特例”。据报道，英国谢菲尔德大学负责猫鲨胚胎研究的学者发现了一种名为牙板的“特殊上皮细胞群”，它能再次发育出牙齿。 | 
