自然现象 zìránxiànxiàng natural phenomenon Definitions Defs Origin Strokes Stroke Words Sentences Sents 2 sentences 辐射是一种自然现象。 fúshè shì yīzhǒng zìránxiànxiàng. Radiation is a natural phenomenon. Source: CCMatrix最致命的自然现象是什么? zuì zhìmìng de zìránxiànxiàng shì shénme? What's the deadliest natural phenomenon? Source: AI Challenger 2017