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来源:雅诚德英语网
It is crucial that the upper back and neck are held in an erect position to give support for the head.
重要的是:上背和颈部要挺直以支撑头部,这一点很重要。
It is crucial that the upper back and neck are held in an erect position to give support for the head.
重要的是:上背和颈部要挺直以支撑头部,这一点很重要。