The findings may lead scientists to rethink some of their theories about where comets come from and their role in providing some of the essential ingredients for life on Earth.

• 这些发现或许会使科学家们重新思考他们的某些关于慧星来自何处、它们在为地球上的生命提供必不可少的物质时所扮演的角色等推测。