[N-COUNT 可数名词]激变;剧变;动乱 An upheaval is a big change which causes a lot of trouble, confusion, and worry.
[usu adj N]
Wherever there is political upheaval, invariably there are refugees...
哪里有政治动乱,哪里就一定有难民。
Having a baby will mean the greatest upheaval in your life.
有了孩子意味着你的生活要发生重大的变化。
Oxford
up·heav·al/ʌpˈhiːvl; NAmEʌpˈhiːvl/noun[countable , uncountable ]a big change that causes a lot of confusion, worry and problems 剧变;激变;动乱;动荡SYN
disruption
◆the latest upheavals in the education system最近教育制度上的种种变更◆I can't face the upheaval of moving house again.我无法忍受再次搬家的折腾。◆a period of emotional upheaval情绪波动很大的时期upheavalupheavalsup·heav·al/ʌpˈhiːvl; NAmEʌpˈhiːvl/