Since infants often fall headfirst, spotters hold straps attached to vests the children wear to prevent them from injuring themselves with the cameras, but the children are otherwise free to move.
因为婴儿摔倒时都是头先朝下的，测试人员就牵住孩子所穿背心上的带子，以防摄像头伤了他们，而在其他方面孩子都是可以自由活动的。
The boy's upper arm bones show fractures typical of a headfirst fall from a great height.
那个男孩的上部肩胛骨呈现出的骨折是典型的从高处头部先着地的结果。
The boy's upper arm bones show fractures typical of a headfirst fall from a great height.
那个男孩的上部肩胛骨呈现出的骨折是典型的从高处头部先着地的结果。
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