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the Neoarchean eon
The Neoarchean eon was a very important period in the history of the Earth.
the Mesoarchean eon
The Mesoarchean eon is a part of Earth's history, which lasted from about 3 billion years ago to about 2.8 billion years ago.
the Archaean eon
The Archaean eon is the oldest era in the history of the Earth.
time for doing something / period of time / season
What is the best time to travel?
importance, consequence, significance
His opinion is very important.
important, significant
Health is very important.
extraordinary, unusual
I was amazed at his extraordinary talent.
very; extremely / exceedingly; tremendously
It is a very beautiful view.
emergency
Please press this button in case of emergency.
history / the study of history
He is interested in history.
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