political upheaval

• 政治大变动，政治动荡

political upheaval的用法和样例：

例句

1. The Yemen-based al-Qaida branch took advantage of a political upheaval in 2011 in Yemen to take over several towns of the southern restive regions.
   2011年“基地”组织在也门的分支趁着也门的政治动荡接管了南部地区一些城镇。