three body problem

例句：

1. 1. The three-body problem is a complex mathematical problem that has been studied for decades.
   三体问题是一个复杂的数学问题，已经研究了几十年。
2. 2. In the field of astrophysics, the three-body problem is a fundamental question about the nature of gravity and spacetime.
   在天体物理学领域，三体问题是一个关于引力和时空本质的基本问题。
3. 3. The three-body problem is still one of the most challenging problems in science, with many researchers workingto solve it.
   三体问题仍然是科学中最有挑战性的问题之一，许多研究人员都在努力解决它。