phragmocone

常见例句

a conical calcareous fossil tapering to a point at one end and with a conical cavity at the other end containing (when unbroken) a small chambered phragmocone from the shell of any of numerous extinct cephalopods of the family Belemnitidae.
烏賊的化石，圓錐形石灰質化石，許多滅絕的頭足類動物。
a conical calcareous fossil tapering to a point at one end and with a conical cavity at the other end containing (when unbroken) a small chambered phragmocone from the shell of any of numerous extinct cephalopods of the family Belemnitidae
烏賊的化石，圓錐形石灰質化石，許多滅絕的頭足類動物