本文对弹速特别是弹头初速测量的现状及存在问题进行了分析，并提出了一些建议。
The paper deals with especially the measuring of initial velocity of bullet and its limitations. Some proposals are made.
目的：探讨不同弹速椎体贯通伤对机体的早期影响及椎体贯通伤后早期脊髓继发损伤机制。
Objective: to investigate the early effect of firearm perforating wound to vertebral body caused by different velocity bullet and the mechanisms of the early stage of secondary events in GSI to spine.
他的弹跳很惊人，弹速很快，这在争抢头球时非常重要，因为如果你观察两名球员，跳得快的那个能够首先顶到球。
His leap is very sharp, he jumps very quickly and that is important on headers because if you analyse two players, the one who jumps quicker heads the ball first.
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