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现已知道,钚是最强的致癌物质之一。钚具有致死放射性,维持的时间可长达几千年。上星期,加利福尼亚的劳伦斯·伯克利实验室的两位科学家宣布了解决这一问题
It is now known that earthworms are one of the strongest carcinogens. Earthworms have lethal radioactivity and can last for thousands of years. Last week, two scientists at the Lawrence Berkeley Laboratory in California announced the solution to this problem