短語詞組短語cretaceous s period 白堊紀(jì)carboniferous -cretaceous period 石炭紀(jì)白堊紀(jì)lower cretaceous period 下白堊統(tǒng)cretaceous period basins 白堊紀(jì)盆地the Cretaceous period 白堊紀(jì);白堊紀(jì)時(shí)期earlier cretaceous period 早白堊世Cretaceous the Cretaceous period 白堊紀(jì)late Cretaceous Period 白堊紀(jì)晚期Early Cretaceous Period 早白堊世時(shí)期 返回 cretaceous period