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Synonym of ペルム紀
The Triassic period is one of the geological ages, referring to the period from about 252 million years ago to about 251 million years ago.
the Triassic period
At what point in Earth's history does the Triassic period fall?
the Silurian period
The Silurian period is one of the geological eras.
the Quaternary period
The Quaternary is the most recent era in Earth's history.
the Devonian period
The Devonian period was a very important time in the history of the Earth.
Kyūjitai form of 三畳紀 (“the Triassic period”)
The Triassic period is one of the geological ages, referring to the period from about 252 million years ago to about 200 million years ago.
(obsolete) Synonym of オルドビス紀
The Ordovician, an era name used in paleontology, is now called the Ordovician.
linguistics
He is majoring in linguistics.
astronomy
He has a deep interest in astronomy.
physics (as an area of study)
He is an expert in physics.
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