•a scientific discovery/experiment/theory科学发现／实验／理论

•scientific evidence/research科学证据／研究

•The project has attracted considerable criticism from the scientific community (= from scientists).这个企划案招致科学界广泛的批评。

•We will have to adopt a more scientific approach in the future.我们将来得采用更审慎而有系统的方法。

•I try to arrange things in some kind of a system, but I'm not very scientific about it.我尽量把事情安排得有系统一点，但不是非常精准。