Most material in the normal impact region is converted into small fragments after the impact while the large fragments are from material far from the normal impact region.

研究结果同时表明正撞击区内的材料大部分转化为了小碎片，大碎片则由远离正撞击区的材料产生。

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The normal impact of a blunt cylindrical projectile on the apex of a thin spherical aluminium cap which caused large permanent displacements was experimentally investigated.

本文报告了平头柱形弹体对铝制球顶壳正撞击时引起的大变形动力响应的实验研究。

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In addition to taking normal images of the impact in the visible spectrum, the HRI provides an infrared "fingerprint" of the material from inside the comet's nucleus.

BBC: Q&A: Deep Impact comet mission

Rapamycin also is being studied for its impact on the normal aging process.

WSJ: Progeria Drug Study Helps in Search for Clues on Aging

But CIOs are holding off even more than normal, for which I can only blame the impact of the Post-PC era.

FORBES: In The Enterprise, Windows 8 Tablets May Zoom Past PCs