Ogpu

例句：

1. 1. The Ogpu was a secret police force during the Soviet era.
   奥格波夫是苏联时期的秘密警察部队。
2. 2. The Ogpu was responsible for investigating and prosecuting political dissidents.
   奥格波夫负责调查和起诉政治异见者。
3. 3. The Ogpu was a controversial organization that played a significant role in shaping Soviet history.
   奥格波夫是一个有争议的组织，在塑造苏联历史中发挥了重要作用。