scientific hypothesis

例句：

1. 1.The scientist proposed a new hypothesis about the origin of life on Earth.
   科学家提出了关于地球上生命起源的新假设。
2. 2. The researcher conducted experiments to test the hypothesis that climate change is causing global warming.
   研究员进行了实验来测试气候变化导致全球变暖的假设。
3. 3.The professor presented a hypothesis that could explain the observed phenomena in the data.
   教授提出了一个假设，可以解释数据中观察到的现象。