extragalactic cosmic rays造句

Still-higher-energy neutrinos, resulting from the interactions of extragalactic cosmic rays, could be observed with the Pierre Auger Observatory or with the dedicated experiment named ANITA.
Due to the mean path associated with this interaction, extragalactic cosmic rays traveling over distances larger than ( ) and with energies greater than this threshold should never be observed on Earth.
It's difficult to find extragalactic cosmic rays in a sentence. 用extragalactic cosmic rays造句挺难的