求翻译：剑龙为一种巨大的恐龙，生存于侏罗纪晚期的食草性四足动物。它们是居住在平原上的食草动物。它的背上有一排巨大的骨质板，以及带有四根尖刺的危险尾巴来防御掠食者的攻击。大约12公尺长和7公尺高，重达4 吨。是什么意思？

Stegosaurus, a huge dinosaur that lived in the late Jurassic herbivorous quadrupeds. They are living in the plains herbivores. A huge row of bony plates, and with four spikes dangerous tail it back to defense against predators. About 12 meters long and 7 meters high and weighs four tons.

For a stegosaurus dinosaur, such a great survival food in the Late Jurassic 4 feet of grass species. They are living in the plains of herbivores. On the back of it there is a huge drain of osteoporosis, as well as with a 4 tail 根尖 puncture hazard to defend against an attack by predators. Approximate

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Stegosaurus is a massive dinosaur, living in the Jurassic advanced herbivorous quadrupeds. They are herbivores living on the Plains. It's on the back of a huge plate of bone, as well as with four spiked tails to help protect against the risk of attacks of predators. About 12 meters long and 7 meters

The stegosaurus is one kind of giant dinosaur, survives in the Jurassic Period later period food grass quadruped.They are live on the plain herbivore.It carries on the back has a row of giant ossein board, as well as has the dangerous tail which four points puncture to defend predator's attack.About