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The "deliberate practice" introduced in this book is based on purposeful practice, but on top of this, there is more emphasis.As the name implies, the decoration mode is to add some new functions to an object, and it is dynamic. It requires the decoration object and the decorated object to realize the same interface. The decoration object holds an instance of the decorated object. The diagram is as follows:In fact, employees, experiences and students describe a role, for example, a person who is a "manager" must be an "employee". In the above design, a person cannot have multiple roles at the same time, and if he is an "employee", he can no longer be a "student". This is obviously unreasonable, because many on-the-job graduate students, even employees, are students.张槐点点头道：这事往后再说，先这么住着。Secret Code of Absolute Poison: For every 100 evil points, the [skill damage] of draining blood from the vertebral heart, destroying the heart and cutting the liver is +50%, and the difference between ourselves and the enemy is +100% for every 100 points of poison.    皇宫权力斗争偃旗息鼓，权九公在权力斗争中地位和实力直线上升，走上了一人之下万人之上的位置，而他的阴谋也渐渐浮出水面，他是被先王灭族的蛮夷族后人，混入朝廷就是想帮助蛮夷族复兴，推翻现王朝的统治，要想达成这个目的，权九公面对的最直接的敌人就是自己亲手培养起来的“八侍卫”。新一轮的斗争 就此拉开序幕，而权九公突然开始怀疑自己的初衷，但有些事一旦开始就没有了退路