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Yan Guicheng, Chief Analyst of CITIC Construction Investment Communications Industry: This year, 5G mobile phones may release dozens of models, but they may still be some flagship models.中学三年级佐由理转学到东京。两位少年放弃了制造飞机的打算。浩纪考进东京的高中，拓也继续留在青森的高中就学，彼此在各自的道路上越走越远。PS: Many forums have seen beginners ask whether WCF still needs to learn in depth, because they think these technologies may be outdated. Maybe Microsoft will launch a new SOA implementation scheme at that time. Wouldn't it be a waste of time to learn in depth, so they feel that there is no need to learn in depth and just know how to use them. I had the same feeling about this problem before, but now I think that although WCF technology may be replaced, the key to understanding a technology in depth is not to know some more advanced API calls, but to understand its implementation mechanism and way of thinking. Even if the latter technology is replaced, the mechanism behind it is definitely similar. Therefore, if you have a thorough understanding of a technology, you will feel familiar with the new technology and relaxed about it. In addition, after you have a thorough understanding of a technology, you dare to say that you have mastered the technology well during the interview, instead of saying that you use it a lot at ordinary times. Once you ask deeply, you do not know the implementation principle behind it. This is also why I want to write WCF series. I hope this opinion is helpful to some beginners.Baidu Internet Disk https://pan.baidu.com/s/1skZQPcT29刘邦成为巴蜀的主人以后，琴氏少不得就要仰仗刘邦存活发展了，毕竟胳膊拧不过大腿的老话还在。Any negligence in the terms of the rules or any negligence in alert required by seafarers' usual practice or special circumstances at that time.