碰撞高度应该是预先计算好的临界高度和次临界高度，碰撞试验证实了其计算结果。

The altitudes of collisions should be calculated critical height and sub-critical height. The collision test proved the results of calculation.

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碰撞高度应该是预先计算好的临界高度和次临界高度，碰撞试验证实了其计算结果。

The altitudes of collisions should be calculated critical height and sub-critical height. The collision test proved the results of calculation.

youdao