政体

例句：

1. 1. The country's political system is highly centralized.
   该国的政治体制高度集中。
2. 2. The new constitution has brought about significant changes in the political system.
   新宪法已经对政治体制产生了重大变化。
3. 3. The government's policy on foreign aid has been a subject of much debate in the political system.
   政府对外援助的政策一直是政治体系中的热门话题。