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熱い暗黒物質 [あついあんこくぶっしつ]

(See 冷たい暗黒物質) hot dark matter (noun (common) (futsuumeishi))

冷たい暗黒物質 [つめたいあんこくぶっしつ]

(See 熱い暗黒物質) cold dark matter (noun (common) (futsuumeishi))