老师一边讲课一边在黑板上写字

We can understand that the responsibility chain mode is a chain composed of processing requests. Requests are passed between these objects in turn until we encounter an object that can process it. We call these objects nodes in the chain. For example, object a sends a request to object b. If object b does not process, it will give the request to c. If object c does not process, it will give the request to d, and so on, until one object can process the request. Of course, if no object processes the request, then the request will leave the chain.成长在黑社会街区的亚飞（梁朝伟 饰）与阿基（张学友 饰）有着超过二十年的友情，胸怀黑社会之梦的二人平日却只是混事度日：砍人时临阵脱逃、从老大尸体上偷金表这些事他们做来毫不脸红，亚飞与阿基二人有着克死老大的神奇特质，他们的每一任老大下场都极其凄惨，尽数死于江湖大佬关公（汤镇业 饰）之手，一时间，二人“老大克星”的名头响彻江湖，连好友波哥（曾志伟 饰）也不敢收留。二人只好退出黑社会，借钱办起了贸易公司，但第一单生意居然是诓骗新加坡女子阿真（袁咏仪 饰）卖身，不忍逼良为娼的二人大闹黑社会，生死关头被关公手下带走，原来笃信命理的关公要借助二人的硬命渡过劫数，于是，在黑社会摸爬多年的二人终于迎来了翻身之日……Let's talk about the concept of rules first, and then explain it in a popular way.林聪忽然紧张起来，耳语道：小心，千万别是蛇。(1) Except that the elastic towed body does not need to display lights at or near the front end, if the width is less than 25m, one ring-illuminated white light shall be displayed at the front and rear ends or near the front and rear ends respectively;板栗却点头道：爹，让他跟我去。方丈慧云离奇失踪，龙山寺求援于杨天淳，杨天淳化身铁猴子潜入秘密组织，发现秘密组织竟然用秘籍、金钱、绑架的方法纠集了一批武功高手进行赌斗，失败者结局就是死，铁猴子得如何揭穿阴谋救出众人呢？