英文英文字典
英文英文字典
古腾堡计划中的在线英语-英语词典
结果
Archaean的结果
Archaean
(a.)
Ancient; pertaining to the earliest period in geological
history.
Archaean
(n.)
The earliest period in geological period, extending up to
the Lower Silurian. It includes an Azoic age, previous to the
appearance of life, and an Eozoic age, including the earliest forms of
life.