The Gulag Archipelago.
古拉格群岛

to get them thrown into a gulag.
被关进古拉格营地

formerly known as the Koshmar or Nightmare Gulag.
原名克什玛监狱或噩梦古拉格营地

and entered a gulag full of the most dangerous criminals.
然后进入一个关满苏联领土上

I understand that you're familiar with the Koshmar Gulag.
我知道你很熟悉克什玛古拉格营地

With The Gulag Archipelago Solzhenitsyn had become too great for the Soviet government.
对苏联当局来说，古拉格群岛让索尔仁尼琴过于伟大。

It is simply wrong to maintain that the gulag was nothing more than a modernized version of its czarist predecessor.
认为古拉格仅仅是现代化的帝俄流放地是完全错误的。