我首先计算-,在你们的参照组中，你们所坐的地方-,失去了多少能量,这是完全非弹性碰撞。
So I will first calculate-- in your frame of reference, - where you are sitting-- how much energy is lost when we have a completely inelastic collision.
而所用密码算法在设计上要使从两组不同数据得到同一个散列值——即“碰撞”——的概率极其小。
The algorithms are designed so that the probability of two different sets of data computing the same hash value — a collision — is extremely small.
这个结论来自CDF实验组对费米实验室的万亿电子伏对撞机产生的数以亿计的正反质子对碰撞所得数据的分析。
The result comes from CDF's analysis of billions of collisions of protons and antiprotons produced by Fermilab's Tevatron collider.
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