1.It may have reared up on its hind legs to reach twigs and leaves, but would normally have been fully quadrupedal.
钉状龙可能用后腿直立起来以接触树叶、树枝，但正常的状态应该是完全四足状态。
2.quadrupedal armored herbivore of the Jurassic and Cretaceous.
侏罗纪和白垩纪的一种四足有甲食草动物。
3.large quadrupedal herbivorous dinosaurs with very long neck and tail; late Jurassic.
侏罗纪后期的大的四足食草恐龙，脖子和尾巴很长。
4.quadrupedal herbivorous dinosaur common in N. America in the late Jurassic.
侏罗纪时期北美洲常见的非常大的四足食草恐龙。
5.In this new position, our innards were not as well supported as they had been in our quadrupedal ancestors.
在这种情况下，我们的内脏就不会像我们祖先那样被很好地支撑住。