2 文書を見つけるための辞書。

• obsolescence
• 自然淘汰
• the process of becoming obsolete; falling into disuse or becoming out of date; "a policy of planned obsolescence"
• 時代遅れになる過程

• survival of the fittest, survival, selection, natural selection
• 淘汰, 自然淘汰, 適者生存, 自然選択
• a natural process resulting in the evolution of organisms best adapted to the environment
• 最も環境に適するよう生物の進化をもたらす自然な過程