放射性元素 fàngshèxìngyuánsù radioactive element Definitions Defs Origin Strokes Stroke Words Sentences Sents 放射性 fàngshèxìng noun radioactivity the property of certain elements to spontaneously emit radiation as their atomic nuclei decay; also used to describe things that are radioactive元素 yuánsù noun element (chemistry) (chemistry) chemical element; a pure substance consisting of only one type of atom.
