So how do you design for function?

那么，您如何设计功能？

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This design aims for harmony of form and function.

这个设计旨在使形式和功能协调一致。

《牛津词典》

Geometric constraints (shape and volume) clearly affect design decisions for devices like cell phones; each new product generation has packed more function into ever smaller forms.

几何约束(形状和体积)无疑影响到设备的设计决策，如手机；每一代新产品都在曾经较小的表格中塞入了更多的功能。

youdao

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。

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