interregnum
/ˌɪntəˈregnəm/noun
(pl. interregnums 或 interregna /-nə/)
1- a period when normal government is suspended, especially between successive reigns or regimes（正常管治暂停时, 尤指统治权更替）中间期, 过渡期。
1.1
the Interregnum
the period in English history from the execution of Charles I in 1649 to the Restoration of Charles Ⅱ in 1660空位期（英国历史1649年查理一世被处决至1660年查理二世复辟期间）。
1.2
- an interval between the periods of office of two incumbents in a parish（教区前后两任牧师之间的） 过渡期。
词源
late 16th cent. (denoting temporary rule between reigns or during suspension of normal government)： from Latin， from inter- 'between' + regnum 'reign'.