If you go shopping in any toy store, you can see clearly the different games and toys for boys and girls: there are a lot of pink toys on one side of the store for girls; and dark-colored cars, guns, and soldiers for boys.

如果你去任何一家玩具店购物，都能清楚地看到男孩和女孩的游戏和玩具截然不同：商店的一侧有很多粉红色的玩具，为女孩提供；而深色的汽车、枪支和士兵玩具则是为男孩准备的。

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Line 20 declares the objective (target) function as the maximization of z, which is the total profit for every kind of toy (there are two: trains and soldiers).

第20行声明了对象函数是z的最大值，这是每种玩具的总体收益(一共有两种玩具：火车和士兵)。

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She looked frazzled and lost onstage, vying for attention with the breakdancing toy soldiers and BILLIONS OF FALLING PRESENTS in the giant screens behind her.

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