一开始导入需要模块和注册不同的函数去创建个体(浮点数列表)，求解的是一个最小化二目标适应度问题。

First import the required modules and register the different functions required to create individuals that are lists of floats with a minimizing two objectives fitness.

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为了获得更好的性能，选用最小的可行浮点数格式是很关键的。

It is critical to pick the smallest possible floating point format in order to get the best performance.

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