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居住在曼哈顿的莉芙（凯特·哈德森 Kate Hudson 饰）和艾玛（安妮·海瑟薇 Anne Hathaway 饰）是一对情同手足、从小一起长大的好姐妹。童年的某天，两人在第五大道的假日大酒店目睹了一场梦幻般的婚礼，从此，在这里举行婚礼的梦想便在她们各自的心中扎下了根。转眼二十多年过去，莉芙成为一名小有成就的律师，艾玛则在一所学校任教，两人也各自收获了美满的爱情。婚期在即，两个女孩子为了婚礼奔波劳碌，并相约担任对方的伴娘。然而令她们想不到的是，两人不仅都以假日大酒店为典礼举办地，而且还请了同一个司仪，更要命的是她们的婚礼都在同一天。这就意味着将有一方做出让步。为了童年的梦想，两个好友互不相让，由此也展开一场激烈且妙趣横生的新娘大作战……Let's understand such a problem first, If our front-end development needs are the needs given to us by the demand side, It is possible that a front-end developer will deal with multiple demanders, Therefore, it will keep in touch with multiple demand parties. Then in the program it means keeping references to multiple objects, The larger the program, There will be more and more objects, The relationship between them will become more and more complicated. Now if there is an intermediary (if it is our supervisor) to meet the needs of multiple demanders, Then the demander only needs to give all the requirements to our supervisor, who will assign tasks to us according to our workload in turn. In this way, our front-end development does not need to contact with multiple business parties, we only need to contact our supervisor (i.e. Intermediary), which weakens the coupling between objects.齐地初定，民风彪悍，须有诸侯统治，加以震慑。于是大家对小孩子们好一番叮嘱。现在该好好继续重用几位心腹重臣，在他们的帮助之下尽快从失败之中恢复过来。故事背景是以1950年共和国成立之初，解放战争的硝烟尚未散尽，我军某大军区高层突然接到紧急命令，在该军区内立即挑选一批身经百战、身怀绝技的战斗英雄，组建一支执行绝密任务的特殊小分队。任务是秘密潜入情况复杂的广西梧州、以及西江一带，接应国民党投诚的一位情报高官，并不惜一切代价，将他所携带的，关系到新中国党和国家安危的绝密文件，秘密护送回北京。