theory of abrupt appearance
Alternative form of abrupt appearance theory
(informal) Very large; worthy of a monster. / (informal) Great; very good; excellent.
present participle of revolutioneer
Any bird of the genus Dendrocygna in the family Anatidae, the family of duck, goose and swan.
化石記録の空白に対処するために、一部の研究者は突然出現説の別の形を提案した。
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