活性 huóxìng activity Definitions Defs Origin Strokes Stroke Words Sentences Sents 灵活性 línghuóxìng flexibility 活性炭 huóxìngtàn activated carbon 活性氧类 huóxìngyǎnglèi reactive oxygen species activated oxygen species (AOS); reactive oxygen species (ROS)活性剂 huóxìngjì reagent reagent (chemistry)表面活性剂 biǎomiànhuóxìngjì surfactant