英汉词典

1.Echinoid: an echinoderm of the class echinoidea which includes the sand dollars and sea urchins.

海胆：一种属于海胆纲的棘皮动物，包括沙钱和海胆。

2.Echinoid: an echinoderm of the class echinoidea which includes the sand dollars and sea urchins.

海胆：一种属于海胆纲的棘皮动物，包括沙钱和海胆。