他计划空军领导的一条新的路线在所有水平。
He charted a new course for the Air Force leaders at all levels.
在扭转力方面，1级和2级的椎间盘在所有水平都保存了运动。
In torsion, both 1 - and 2-level discs preserved motions at all levels.
在所有水平的I级椎间盘，与中立位相比，在屈曲位向后、伸展位向前膨出。
Grade discs at all levels moved posteriorly in flexion and anteriorly in extension when compared to neutral posture.
在所有水平的I级椎间盘，与中立位相比，在屈曲位向后、伸展位向前膨出。
Grade discs at all levels moved posteriorly in flexion and anteriorly in extension when compared to neutral posture.
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