As word
1Xian3
Phanerozoic, geological eon lasting since the Cambrian 寒武紀|寒武纪 [Han2 wu3 ji4], c. 540m year ago 2sheng1
Phanerozoic, geological eon lasting since the Cambrian 寒武紀|寒武纪 [Han2 wu3 ji4], c. 540m year ago 3zhou4
Phanerozoic, geological eon lasting since the Cambrian 寒武紀|寒武纪 [Han2 wu3 ji4], c. 540m year ago