求翻译：绝大多数的海胆都是雌雄异体的，海胆的五个生殖腺位于体腔的步带区，贴近硬壳内缘且连在体腔壁上。它们会将精子及卵子排出海水中受精，沙钱在生殖孔附近有细长的生殖疣足，把精子及卵子送到沙面，协助增加受精机会。部份的海胆会把受精卵放在围口部或围肛部附近，以棘刺包围和保护这些卵。是什么意思？

The vast majority of sea urchins are dioecious, the five gonads of sea urchins in the body cavity of step with the area, close to the hard shell inner edge and even in the body cavity wall. They are the sperm and the fertilized egg from seawater, sand dollars in the gonopore near the genital warts o

Most of the sea urchins are females, and the variant of the sea urchin gonads are located in 5 of the body cavities with hard-shell case, and close to the edge and even on the wall in body cavities. They will be discharged from the sperm and eggs fertilized in the water, and sand holes in the reprod

The overwhelming majority sea urchin all is the dioecism, the sea urchin five gonads are located the body cavity the ambulacrum area, in the drawing close to hard shell the reason also continually on the body cavity wall.They can discharge the sperm and the egg in the sea water the fertilization, th

Most sea urchins are dioecious, five of the Sea Urchin gonads in the body cavity of a stripe, closer to the crust edge and even on the cavity wall. Discharged they will take the sperm and egg fertilization in seawater, Sha Qian near the hilum are genital warts of thin feet, take sperm and eggs to th

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