突變
?sudden or abrupt change
?leap;mutation
國際形勢的～abrupt change of the international situation/風云～，軍閥重開戰(zhàn)。(毛澤東詞《蔣桂戰(zhàn)爭》) Sudden veer of wind and rain.The warlords fight again.(Mao Zedong’s poem The Warlords Fight)/在認識上從漸變到～from a gradual change to a leap in the process of cognition/自發(fā)～spontaneous mutation