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…,对汉国而言，尤其的压力巨大的，他们的兵力有限，只能够集中兵力着重防守一个地区。On the contrary, the slower the shutter speed, the more blurred the moving object will be.The reason why the logic for creating an object is put into a separate class is that it can be used by multiple clients. And separates the creation and use of objects. However, this design also has many defects. First of all, SimpleFactory is a specific class, so we must program for the implementation, making the system lose its flexibility in this respect. Second, if we add new products, we have to modify the code in SimpleFactory, which violates the opening and closing principle. The above model is also called simple factory. He does not appear in GOF mode, it is more like a programming habit.Age: 22You can see that there are many simulators in it. If you only need FC, add the specified module.他们活了半辈子，也没吃过这等苦，可大苞谷当年才几岁？待大苞谷说张家认了个假儿子，陈家三人再也哭不出来了。Related: