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obligatory

英 [ə'blɪgət(ə)rɪ] 美[ə'blɪɡətɔri]
  • adj. 义务的;必须的;义不容辞的

英英释意


1. morally or legally constraining or binding;
"attendance is obligatory"
"an obligatory contribution"
2. required by obligation or compulsion or convention;
"he made all the obligatory apologies"