conjectural variation

例句：

1. 1. The scientist made conjectural conclusions based on his observations.
   这位科学家根据他的观察做出了推测性的结论。
2. 2.The team decided to take a conjectural approach to the problem.
   团队决定采取一种假设性的方法来解决这个问题。
3. 3. Thephysicist made conjectural modelsof the universe's formation.
   物理学家提出了关于宇宙形成过程的推测性模型。