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the Paleoarchean eon
The Paleoarchean eon is a very old era in the history of the Earth.
paleobotany
He is an expert in paleobotany.
Kyūjitai form of 古植物学: paleobotany
He is an expert in paleobotany, conducting research on plants from the dinosaur era.
a surname
Mr. Koshi is my best friend.
Kiyoshimizu is my friend.
to take the initiative; to forestall; to beat to the punch
He always takes the initiative to act.
(organic chemistry) tetracosane
Tetracosane is one of the important compounds in organic chemistry.
(organic chemistry) heneicosane
Heneicosane is one of the important compounds in organic chemistry.
(organic chemistry) cycloicosane
In the organic chemistry experiment, we succeeded in synthesizing cycloicosane.
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