隐生宙 / 隱生宙

yǐn​shēng​zhòu

cryptozoic

The geological eon before the appearance of abundant fossils, characterized by "hidden life," preceding the Phanerozoic eon.

隐生宙时期，地球上的生命形式主要是简单的单细胞生物。

adjective

created sense Mar 4, 2026, 02:25 AM