critical distance

例句：

1. 1. The scientist calculated the critical distance between the two objects to determine their relative motion.
   科学家计算了两个物体之间的临界距离，以确定它们之间的相对运动。
2. 2. In physics, the critical distance is the point at which a system undergoes a phase transition.
   在物理学中，临界距离是系统发生相变的那个点。
3. 3. The researcher found that the critical distance for the material's failure was significantly lower thanpreviously thought.
   研究人员发现，该材料的临界失败距离远低于之前的预期。