casus foederis

名词 n.
英 /ˌkeɪ.səs ˈfiː.də.ɹɪs/   

英文释义

名词 n.
  1. A situation covered by the terms of an international treaty (or similar understanding), and which consequently requires action from the parties involved.

词源

From Latin casus (“case”) + foederis, genitive of foedus (“treaty”).
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