Archean
ɑ:'ki:әn
基本解释
n. 太古代
a. 太古代的
英文释义
n. the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
s. of or relating to the earliest known rocks formed during the Precambrian Eon
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