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After that, I will introduce several common basketball on the market:2. The coupling between the publisher and the subscriber is reduced. The publisher only publishes a message, and it does not care how the message is used by the subscriber. At the same time, the subscriber only monitors the event name of the publisher. As long as the event name of the publisher remains unchanged, it does not care how the publisher changes. Similarly, the seller (publisher) only needs to tell the subscriber (buyer) about the arrival of shoes, regardless of whether the buyer buys or not, or whether he buys other sellers. As long as the shoes arrive, the subscriber can be notified.微综艺《爱情这件小事》，罗拉、王能能，熊笑宇、宋名申，聂墨仪、陈强，三对恋人将开启浪漫之旅。计议妥当后，王大郎的叔婶就带着玉如悄悄地离开了，在城外找了地方住下，当没回来一样。The First World War lasted for 4 years and 3 months from July 1914 to November 1918. The war swept across Europe, Asia and Africa, with 34 countries and regions participating in the war. The population affected by the war reached more than 1.5 billion, accounting for 75% of the world's population at that time. The two sides mobilized 889 divisions with a total of 74 million troops, 8.4 million killed and 21 million injured.安吉拉在那里得知令人惊讶的事实，而她曾经所坚持的信念也开始动摇……Extension: