obligatoriness
Concerned with something else; distracted; giving one's attention elsewhere. / (taxonomy, not comparable) Describing a scientific name that was previously used, a junior homonym.
Synonym of rachidial
The quality or state of being obligatory.
plural of Kepler-Poinsot polyhedron
研修の冒頭で安全プロトコルの義務性が強調された。
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