1. They can also become rolling loops or bipedal, walking robots. 链型机器人也可以组装成环型的滚动机器人或两足步行机器人。
2. gigantic carnivorous bipedal dinosaur of the Jurassic or early Cretaceous in Europe. 侏罗纪或白垩纪早期欧洲巨大的食草性两足恐龙。
3. Summary of Background Data. Pars defects are thought to be due to repeated mechanical stress on the spine in individuals with bipedal posture. 背景数据信息概要：峡部缺损认为是在双足站立姿势下脊柱上的反复机械应力所致。
