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In the previous example of electric lights, a state mode program was completed. First, the Light class is defined, which is also called Context here. Then in Light's constructor, to create instance objects for each state class, Context will hold references to these state objects in order to delegate the request to the state objects. The user's request, that is, the action of clicking button, is also implemented in Context, with the following code:本剧围绕四名共同“生活”上百年的吸血鬼展开，第二季中他们将继续努力在当代美国找寻自我方向，啼笑皆非地面对人类超级碗派对、网络暴民、新晋加官恋权的精力吸血鬼，以及所有自在游荡于纽约都会区的幽灵、女巫、招魂师、僵尸和潜行刺客。在这个食物的世界里，他们发生了好多的搞笑的小故事，逗趣的，好玩的，误会的，吹牛的，一个个好玩的，有趣的小段落。有为青年潘文受其祖父潘伯通之传授，略懂风水术数之学，算出其弟并未夭折，尚在人间，原来正是猛烈追求他女友舜(伍咏薇)的浮夸子弟钱日希。希之养父钱祖祥在商场竞争中落败，希为了夺回所有，不择手段，打击舜父公司，同时骗得舜下嫁。过程中害死通，并导致生父霖入狱。希对香港龙脉虎视眈眈，欲占据福地，攫取利益，文挺身而出，以其风水术数之学力图遏止希的野心，两兄弟互相对峙，冲突一浪接一浪。老七。齐军有没有逃走了？尹旭沉声询问。其实越国崛起南方对西楚国而言本身就是一种巨大的压力。