颈椎是具有强度和柔韧度的力学结构。
Cervical spine is a mechanical structure that has both strength and flexibility.
腰部必须具有相当的柔韧度和力量，它是舞蹈动律的核心部位。
Waist must have considerable Flexibility and strength, which is the heart of dance grooves.
腰部必须具有相当的柔韧度和力量，它是舞蹈动律的核心部位。
Waist must have considerable Flexibility and strength, which is the heart of dance grooves.
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