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abundante cautela [abundante cautela 词源字典]: "= ex abundante cautela", Early 18th cent. Shortened from ex abundante cautela.[abundante cautela etymology, abundante cautela origin, 英语词源]
ex abundante cautela: "By way of extreme caution; as an added precaution", Late 17th cent. From post-classical Latin ex abundante cautela by way of extreme caution from classical Latin ex + abundante, ablative singular of abundāns + cautēlā, ablative of cautēla.