万一发生事故时，座椅带能保护驾驶员和乘客，同时减少碰撞对人体的冲击。

Seat belts protect drivers and passengers in case of accident. They also reduce the effect of a crash on the body.

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然后从两个层面对哈希函数的碰撞对问答认证的安全性可能产生的影响进行了分析。

Then we analyze the influence on the security of challenge-response authentication by collision of hash from two aspects.

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本文采用结构化的贴体网格，来对模拟分子的运动进行定位和对碰撞对进行抽样统计。

With the structured body-fitted grids, the movement of simulate molecular is traced and the collision molecules is selected.

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and I think that's one of, I guess, the biggest cultural clashes, especially with Americans going abroad,

我认为这是一种激烈的文化碰撞，特别是对出门在外的美国人，

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And so the photons hitting the wall actually put pressure on the wall, but the pressure is so low.

所以光子碰撞墙面,事实上在对墙加压，但只是压力很小。

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