【上位】 perform an action, or work out or perform (an action); "think before you act"; "We must move quickly"; "The governor should act on the new energy bill"; "The nanny acted quickly by grabbing the toddler and covering him with a wet towel" 行動を実行する、うまく乗り切る、（行動を）遂行する。
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【下位】 revert back to bad behavior after a period of good behavior; "The children fell from grace when they asked for several helpings of dessert" 良いふるまいの期間の後、悪いふるまいへ戻る。
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