Biologists have hypothesized a relationship between the two species. 生物学家猜测，这两个物种间可能存在某种关系。I have long hypothesized a connection between these factors.我一直以来就认为这些因素之间存在着某种关联。Psychologists hypothesized that his odd behavior was caused by a chemical imbalance in the brain.心理学家猜测，他奇怪的行为是由大脑中的化学物质失衡引起的。