separation hypothesis

例句：

1. 1. The scientists proposed anew hypothesis to explain the phenomenon.
   科学家们提出了一个新的假设来解释这一现象。
2. 2. Thishypothesis has been tested invarious experiments.
   这个假设已经在各种实验中得到了测试。
3. 3. Thehypothesis suggests that the twospecies may have evolved independently.
   该假设表明这两种物种可能已经独立进化。