The answer is I can't. OK, in the simple case of integers I can, but in the case of something more complex like faces or fingerprints or passwords for that matter, it's hard to design a hash function that has completely even distribution, meaning that it takes any input into exactly one output spot.

答案是我不能，好吧,在简单的整数的例子中,我可以做到，但是在一些更复杂的场景中,比如面部，指纹，密码相关的问题中，很难设计一个哈希函数具备完全平均的分配,也就是说，做到对任一输入，可以准确地得到相应的唯一输出,因此在一个哈希问题中。

麻省理工公开课 - 计算机科学及编程导论课程节选

Include patient input in the design and development process, and build in feedback mechanisms.

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We are also grateful to ESA for their thoughtful input into the design plans which will result in the most efficient and modern facilities that will not only benefit E3 but all of the new conventions that will come to Los Angeles.

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According to the lead author, Dr. Paul Ridker of the Brigham and Women's Hospital in Boston, Massachusetts, the pharmaceutical company had no input in the study's design and didn't see the final data analysis until the study was submitted for publication.

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