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Bridging mode is to separate things from their concrete implementation so that they can change independently. The purpose of bridging is: Decoupling abstraction and implementation, So that the two can be changed independently, Like our commonly used JDBC bridge DriverManager, when JDBC connects databases, it switches between databases without moving too much code or even at all. The reason is that JDBC provides a unified interface, each database provides its own implementation, and a program called database driver is used to bridge. Let's look at the diagram:郑氏问道：珊瑚姑娘可醒了？一个丫头道：还没呢。神奇校巴的孩子们冲向轨道，进入国际空间站，却发现他们需要逃离一只巨型缓步动物！　　《小主起来嗨》将首度聚焦自媒体——网络主播，通过励志，惊悚，歌舞，黑帮，青春，漫画等多变画风的自由转换，围绕“生活就是秀场，人生各自精彩”这一主题，打造一部爆笑网络喜剧。Thank you very much for using the People's Network service! In order to further respect and protect the relevant legitimate rights and interests and privacy of users, a new version of the user service agreement has been launched. This agreement contains the specific usage specifications of our platform, the terms of service of the platform and the terms of our collection, storage, protection, use and sharing of your personal information. Please read carefully and fully understand the relevant terms, and the key terms have been marked for you to help you understand the ways to safeguard your relevant rights and obligations and privacy rights. You click "Agree and Continue" to mean that you have read and agreed to our "Common People's Network User Service Agreement". We will do our best to protect your personal information and legitimate rights and interests. Thank you for trusting and using Common People's Network!So you said that the protective equipment did not play a protective role, Of course it did, In those days, Bulletproof vests and other things are still not popular, Helmets are the most important protective gear, I am lucky to wear a helmet, Otherwise, I would have been a martyr long ago, and I chose whether to wear a helmet or a cloth hat. There is no mandatory regulation. I heard that the artillery of the Vietnamese army at position 149 is relatively fierce, so I chose a helmet to enhance the protection of my head. I didn't expect it to be of great use in this place. To be honest, every time I think about it, I still "thank myself." Zhang Xiaobo said here and subconsciously touched his head, as if he were glad that he was wearing a helmet at that time. Otherwise, according to the description of the lethality of this large killing insect, not to mention five or one nailed to his head, the consequences would be unimaginable.吕馨摇了摇头。