"元祖"是个多义词，它可以指上证A股烘焙企业,宗族含义,元祖
这个适应度值是通过设置值和元祖关联。
The fitness is set by setting the values to the associated tuple.
我们先到了元祖一起动手做蛋糕，然后去了农场挖地瓜和萝卜。
We went Canso to make a cake in the morning, then we went to the farm digging the sweet potatos and radish.
与处理单目标适应度不同，这里评价函数必须返回一个元祖因为单目标是作为多目标的一个特例而已。
Dealing with single objective fitness is not different, the evaluation function must return a tuple because single-objective is treated as a special case of multi-objective.
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