Complex sentence: It is an acronym for cubic kilometer size (KM3) Neutrino Telescope and will host a neutrino telescope in the form of a water Cherenkov detector with a volume of at least one cubic kilometre.
Split into simpler sentences: It is an acronym for cubic kilometer size (KM3) Neutrino Telescope. It will host a neutrino telescope in the form of a water Cherenkov detector with a volume of at least one cubic kilometre.