放射性材料 fàngshèxìngcáiliào radioactive material 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材料 cáiliào noun material raw material; physical substance used for making or doing something
