closed universe

例句：

1. 1. The scientist believes that the closed universe could be a key to unlocking our understanding of the cosmos.
   这位科学家认为，封闭宇宙可能是解锁我们对宇宙理解的关键。
2. 2. The idea of a closed universe has been debated for decades.
   封闭宇宙的概念已经辩论了几十年。
3. 3.In this closed universe, time moves at a different rate than in the outside world.
   在这个封闭的宇宙中，时间以不同于外界的速度移动。