Noun:

1. the flat ciliated free-swimming larva of hydrozoan coelenterates

plansn.预划；平面图名词plan的复数形式.plann.计划；方法；策略；设计图；平面图v.打算；安排；计划；设计plan for attack攻击计划planning theory规划理论planocompressedadj.平扁的planform fillet平面形整流带planned markets计划市场planstic tunnel小拱棚Planck function普朗克函数planned balance事先平衡planning factor计划因素planum sternale[医] 胸骨平面

1. In the adult, or medusa stage of a jellyfish, they can reproduce sexually by releasing sperm and eggs into the water, forming a planula.
   在海蜇成体或水母体阶段，它们通过将精子和卵于释放到水中形成浮浪幼体而进行有性繁殖。