hypothesis的复数形式是hypotheses。当hypothesis作“假说，假设”的意思时它是可数名词，有单复数形式，其复数形式为变sis为ses。

Different hypotheses have been put forward to explain why these foods are more likely to cause problems.  人们已经提出不同的假说来解释为什么这些食物更有可能带来问题。

A series of in vivo experiments following the same principle confirmed these hypotheses.  原理相同的一系列体内试验证实了这些假设。

Learning curve was based on three hypotheses.  学习曲线的建立基于三个基本假设。

Several hypotheses for global warming have been suggested.  关于全球变暖的原因已有了好几种假说。