'Big Crunch'是英语，中文翻译是“大坍缩”，是宇宙学中的术语，指如果宇宙中的物质密度超过了一个临界值，那么宇宙将发生坍缩，最终形成一个非常致密的点。这个过程可以被看作是宇宙的“相对论末日”。
例句：
1. The Big Crunch is one of the proposed ways in which the universe could end.（大坍缩是宇宙可能结束的几种提出的方式之一。）
2. Some scientists believe that if the universe continues to expand, gravity will eventually cause a Big Crunch.（一些科学家认为，如果宇宙继续膨胀，重力最终将导致大坍缩。）
3. The concept of Big Crunch is central to some theories of the fate of the universe.（大坍缩的概念对于一些关于宇宙命运的理论至关重要。）
4. Big Crunch would result in the end of everything, including time and space.（大坍缩将导致一切的终结，包括时间和空间。）
5. The Big Crunch is just one of the many possible scenarios for the end of the universe.（大坍缩只是宇宙末日的许多可能情况之一。）
6. Many scientists are studying the possibility of a Big Crunch as a way to better understand the universe.（许多科学家正在研究大坍缩的可能性，以更好地理解宇宙。）
7. The Big Crunch is a theoretical concept that has yet to be observed or proven.（大坍缩是一个尚未观察或证明的理论概念。）
8. Some physicists believe that a Big Crunch could be avoided if the universe continues to expand at its current rate.（一些物理学家认为，如果宇宙以目前的速率继续膨胀，大坍缩可以避免。）
9. The Big Crunch is a popular topic in science fiction, often used as a way to depict the end of the world.（大坍缩是科幻小说中的热门话题，常用来描述世界末日。）
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