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1. Oxford Dictionary

   vigilance

   • IPA[ˈvɪdʒɪləns]

   英式

   • n.
     the action or state of keeping careful watch for possible danger or difficulties

   • noun: vigilance

2. • 釋義

   n.

   名詞

   • 1. the action or state of keeping careful watch for possible danger or difficulties security duties that demand long hours of vigilance