如何使用 "echinoderm" 造句

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. echinoderm having a flexible sausage-shaped body , tentacles surrounding the mouth and tube feet ; free-living mud feeders : sea cucumbers .
身体灵活形如香肠的棘皮动物;触须分布在嘴和管状脚的周围;自由生活的泥地食客:海参。
3. The echinoderm biomass in this area ( 6.18g / m ~ 2 ) is higher than that in the South China Sea and the East China Sea .
全区棘皮动物生物量6.18g/m~2,均较南海和东海的高;