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BBC宣布续订第11季。明心顿时也白了脸，素谨更是摇摇欲坠。Rich learning content and resources一九五零年，抗美援朝时期，国民党反动派制定了破坏我铁路运输及军用物资的“春雷计划”行动。为粉碎敌特阴谋，以韩立冬和刘玉娥为代表的安东铁路公安人员在我党领导下密切合作，慢慢接近特务组织。特务头目周春山频频用计，韩立冬见招拆招，终将特务组织一个个连根拔起，却招致周春山的暗中追杀。在公安处长郑新民的精心策划下，韩立冬成功打入敌特内部，凭借过人的侦查手段，找到日本关东军当年藏在安东的秘密军火库地图和一份极其重要的潜伏特务名单，及时铲除一直深潜在公安内部的特务“老刘”。经过一系列紧张而激烈的战斗，周春山及其特务组织最终被一网打尽，而被美军炸毁的鸭绿江大桥也在群众帮助下及时抢修完毕，从而保证前线物资供应。Now, let's imagine why these "checkpoints" are called "chains" in iptables. As we know, The purpose of a firewall is to match "rules" for passing messages, Then execute the corresponding Action, So, when the message passes through these checkpoints, You must match the rules on this level, However, there may be more than one rule on this level, But there are many rules, When we put these rules in a chain, A "chain" has been formed. Therefore, we imagine each "checkpoint" as shown in the following figure. In this way, it is more appropriate to call them "chain". Each message passing through this "checkpoint" must match all the rules on this "chain". If there are qualified rules, the corresponding actions of the rules will be executed.The above points are the landlord's own inventory.该剧通过描写以马小跳为代表一群孩子的快乐生活以及他们和家长、老师、同学的好玩故事，映射当代儿童的生活现实与心理现实，深情呼唤张扬孩子的天性，舒展童心、童趣，探析成人世界与儿童世界之间的隔膜、误区，倡导理解、沟通，让孩子拥有健康、和谐、完美的童年。