phanerozoic
adj.(由古生代、中生代和新生代构成的地质年代)显生宙的
难易程度:
phanerozoic为短语/超纲词汇
phanerozoic
The Phanerozoic (British English Phanærozoic) is the current geologic eon in the geologic timescale, and the one during which abundant animal life has existed. It covers roughly 542 million years and goes back to the time when diverse hard-shelled animals first appeared.
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