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a male given name
Keijiro is my best friend.
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.
secondary
He was affected by secondary effects.
two-dimensional array
This two-dimensional array represents students in each row and subjects in each column.
(algebra) binary operation
Binary operation is one of the basic concepts in algebra.
(chemistry) silicon dioxide
Silicon dioxide is a major component of glass and ceramics.
a hendecagon
He drew a hendecagon shape.
a pentadecagon
He was drawing a pentadecagon shape.
a tridecagon
He was drawing a tridecagon shape.
a tetradecagon
He drew a tetradecagon shape.
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