早期的失败原因可能与诊断有关，非凡是颈椎扭伤，它在汽车事故中经常发生且诊断困难。

Immediate failures are probably due to associate diagnoses, particularly cervical spine strain, which is common after automotive accidents and difficult to diagnose.

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颈椎痛的一个常见原因是肌肉扭伤或者拉伸。

A common cause of neck pain is muscle strain or tension.

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枕头的两端高度，保护人体在侧卧时不会扭伤颈椎与软组织。

The height of the sides of the pillow protects your body from twisting of cervical vertebra and soft tissues.

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