When the dog is in motion, the back should remain firm and level.
狗在行进中, 背线保持水平和稳定。
What Is the Effect of Motion Preservation on Adjacent Level Degeneration ?
活动度保留对临近节段退变的作用是什么？
Computational Simulation of Human Motion Based on Comfort Level Maximization
基于舒适度最大化的人体运动控制
When moving, the tail is carried inclined slightly downward or level with the back, and with a wagging motion.
运动中, 尾巴与背部齐平或略低, 带有摇摆的动作。
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