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promethium    音标拼音: [prəm'iθiəm]
n. 烯土类元素

烯土类元素

promethium
n 1: a soft silvery metallic element of the rare earth group
having no stable isotope; was discovered in radioactive
form as a fission product of uranium [synonym: {promethium},
{Pm}, {atomic number 61}]


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