Like their sea star cousins, crinoids have five or more arms and askeleton constructed of calcified plates elaborately slotted together.
像海星一样，海百合也有五条或者更多条长腕，还有一个由钙化层整齐排列在一起的外壳。
They are ground into metal plates with a "small knife", will be carved into five yellow five-pointed star of toilet paper.
他们是用一把铁片磨成的“小刻刀”，将黄色的草纸刻成五颗五角星。
They are ground into metal plates with a "small knife", will be carved into five yellow five-pointed star of toilet paper.
他们是用一把铁片磨成的“小刻刀”，将黄色的草纸刻成五颗五角星。
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