循环系统 xúnhuánxìtǒng circulatory system Definitions Defs Origin Strokes Stroke Words Sentences Sents 循环 循環 xúnhuán verbnoun to circulate to cycle, circulate, or move in a loop系统 系統 xìtǒng noun system A whole composed of parts that work together to perform a function or achieve a goal; a series or group of related things forming a complex whole.
