单词	Precambrian
释义	Precambrian adjective Pre·​cam·​bri·​an (ˌ)prē-ˈkam-brē-ən  -ˈkām-  : of, relating to, or being the earliest era of geologic history or the corresponding system of rocks that is characterized especially by the appearance of single-celled organisms and is equivalent to the Archean and Proterozoic eons see Geologic Time Table Precambrian noun Word History First Known Use 1864, in the meaning defined above
随便看	blackgums blackhander blackhanders blackhaws blackhead blackhead disease blackhead minnow Blackhead Persian blackheads blackheart blackhearted blackhearts blackie blackies blacking blacking out blackings blackish blackisher blackishest blackjack blackjack pine blackjacked blackjacking blackjacks

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