If someone has convulsions, they suffer uncontrollable movements of their muscles.
N-COUNT
(国家、体系、组织发生的)动乱,骚乱
If there are convulsions in a country, system, or organization, there are major unexpected changes in it.
例句
...the political convulsions that led to de Gaulle's return to power in May 1958.促使戴高乐在1958年5月重新上台的政治动乱...the great convulsion of the eighteenth century.18世纪的巨大动乱