nuclear option
noun [ C usually singular ] uk/ˈnjuː.klɪər ˌɒp.ʃən/ us/ˈnuː.kliː.ɚ ˌɑːp.ʃən/
（在特定情况下的）极端选择
an extreme choice when reacting to a particular situation
They considered plans to take the nuclear option and close the university completely. 他们考虑了极端的选择，即完全关闭这所大学。