以下为句子列表：
英文: At the begin, we decompound the frame-work to seven class set, which are object class set, interaction class set, model class set, federate-agent class set, simulation class set, interface class set and framework class set, and offer a class-hierarchy str
中文: 先把空袭目标流邦元分解为7大类集，即对象类集、交互类集、模糊类集、联邦成员代理类、仿真类集、界面类集、框架类集，并给出其类层次结构图，然后对各个类集的具体实现方法进行了详细设计。
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英文: Because the skin excretes melanin, which will come out absorb the UV rays from sun and darken the skin, but the hair doesn't, it can only decompound melanin.
中文: 答案一，人体会在皮肤表面增加黑色素的沉积，阻挡阳光中的紫外线深入皮肤内层,但是头发没这本事，只会分解黑色素。
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