particle theory
(chiefly US, colloquial, idiomatic, somewhat vulgar) To be brave; to show some courage, especially in a situation in which one has so far failed to do so.
A surname.
plural of flyswatter
(dated) atomic theory
19世紀には、原子説が現代の原子モデルに取って代わられる前まで科学界の議論を支配していた。
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