Dìzhìxuéjiā / bǎ / Hánwǔjì / yǐlái / de / màncháng / shíqī / chēng / wéi / Xiǎnshēngzhòu地质学家把寒武纪以来的漫长时期称为显生宙。Geologists call the long period since the Cambrian the Phanerozoic.