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A program based on policy mode consists of at least two parts. The first part is a set of policy classes, which encapsulate specific algorithms and are responsible for specific calculation processes. The second part is the environment class Context, which receives the client's request and then delegates the request to a policy class. We first use traditional object-oriented to implement it.Telecommunications　　但再一次的相遇让两人从敌人，重新变回朋友。童年误会解开后，两人和好如初，学习很好并早已通过大学考试的teh提出帮助oh-aew补习中文。补习的过程中，他们更好地了解彼此，并感到他们曾经从未有过的感觉，感情的种子在心底悄悄发芽。但oh-aew先前暗恋同样学习很好的一位男同学，而teh也追求同班的一位女同学两年，感情的交错至使他们把对彼此的想法藏在心底。Netflix已续订《我本坚强》第三季。本剧是根据同名小说《战火中的青春》改编的。 　　When Liu Guangyuan and other four people finished laying new mines and were ready to return, The Vietnamese army launched a new round of attacks. The main force of this attack was still those "living biological weapons" similar in appearance to "dogs". Among the soldiers responsible for continuing to stick to their positions, gunner Wang Zeduan saw very clearly because he was deployed on a higher favorable shooting terrain. In the interview, he recalled:　　他们似乎即将结束这段关系。