预警系统 yùjǐngxìtǒng early warning system Definitions Defs Origin Strokes Stroke Words Sentences Sents 预警 預警 yùjǐng noun early warning to warn in advance; a preliminary warning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.
