The principle of opening and closing means opening to expansion and closing to modification. When the program needs to be expanded, the original code cannot be modified, but the original code should be expanded to achieve a hot plug effect. Therefore, a summary of one sentence is: in order to make the program scalable, easy to maintain and upgrade. To achieve this effect, we need to use interfaces and abstract classes, etc. We will mention this point in the later specific design.
How to acquire professional skills, no one can deny the meaning of practice makes perfect. Lazy by nature, we are always looking for excuses and trying to avoid practice. One day, Gladwell, author of the best-selling book "Alien," told you: "The reason why genius in people's eyes is outstanding is not that it is superhuman, but that it has made continuous efforts. As long as it takes 10,000 hours of training, anyone can change from ordinary to extraordinary."
袁志勇是京剧武生，白天以唱戏为生隐藏身份，晚上 化身为火龙大侠，配合抗日游击队集结力量，军民团结一心一致抗日，他操着一 口京腔，用幽默诙谐的语言与日本人调侃斗智斗勇，把日本人搞得晕头转向，每 一次风口浪尖的对决，总能转败为胜。他武功超群，为了减少伤亡，经常只身一 人潜入日本军统区奋勇杀敌，单刀赴会解救同胞，在危难之时英勇战斗奋勇杀敌。 起因是由于袁志勇因在东北抗日与日本人周旋杀死日本军部的指挥长官（中野樱 子的父兄）等军政要员，因而踏上了一边逃亡一边抗日的隐姓埋名的生活所到的 这一站是荔波。樱子也到荔波追查袁志勇的踪迹伺机寻仇。两人殊死搏斗，最终 战胜六武士，樱子逃走。
"Yes, This is 20 minutes, It is also for this reason, Alas, these 20 minutes, I felt longer than two years, Without artillery support, There have been many "halts" in the positions. So I also saw clearly what that strange smell was. How can I describe it-it looks like the strange thing like a dog before, Four feet, Round and thick body, running very fast, but the difference is its back, above is not hairless kind of skin, but one by one full of small peach size purple "blood bubble", a strange thing can carry at least more than ten, it runs, these "blood bubble" before and after the left and right trembling, that makes people see scalp pins and needles.
The following is an example of rewriting electric lights to show this lighter approach:
该剧根据丹·布朗同名畅销小说改编，讲述哈佛大学符号学家教授罗伯特·兰登（阿什利·祖克曼 饰）必须解开一系列致命谜题，以拯救他被绑架的导师，同时挫败一个可怕的国际阴谋。
以领导世界造船事业的韩国造船业界为背景叙述年轻男女的爱与野心欲望之故事.......
The picture comes from the Internet.
一场流星雨降临在盖亚星球，全球居民见证了百年难得一见的天象奇观，但随后一场突然爆发的神秘感染性疾病席卷而来，居民被感染后丧失理智，具有强烈攻击性，身上散发类似柚子花的香气，幸存者伯尼试图拯救星球
Bridging Mode:
包公出巡之龙凤肚兜是由内地台湾地区拍摄的一部电视剧，类型为古装动作片。上映于2011年5月。 狂风卷落叶，天狗食白日。天降异象，惊动了出巡蔡州郑县的包拯（金超群饰）一行。突然，一群神秘人从天而降，几下身手便将包拯连人带轿掳走，原来掳人者乃郑县高姓大宅公子高天仪（陈志朋饰），他要状告当今圣上抛妻弃子！ 郑县高府中，包拯拜会当年被选入宫的王秋容（魏秋华饰）。秋容取出昔日宋仁宗（张铁林饰）临幸的证物龙凤肚兜，直指天仪便是当今太子，包拯和公孙策（范鸿轩饰）认定此事与宫廷有莫大关连。这时高家次子天佑（夏雨饰）突然闯入，包拯发现他智商愚钝，秋容、天仪则处处维护。
Mrs McCarthy and Lady Felicia are held hostage by a bumbling pair ysgou.cc of train robbers.
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也不吃肉，把骨头给他啃就成了。
The Pacific version of Medusa's Raft
相传，为了让亲人常伴身边，民间常将逝去亲人的骨灰混入黏土烧制成精美的瓷器，逝去亲人的灵魂就会萦绕在骨灰瓷器的周边久久不散。但一旦灵魂有怨气，则生人则会被带入恐惧深渊，直至怨气消散…… 影片讲述单纯善良的绮华的未婚夫青文因事故坠海身亡，悲痛欲绝的绮华为了与青文长相厮守，听取了闺蜜的意见，效法民间传说巫术，将青文的骨灰烧制成人骨花瓶。 自此，绮华时刻能感到青文继续存在家里的迹象，青文的魂魄似乎又回到了绮华身边，但逐渐事态失控了，绮华家里接连出现各种灵异恐怖事件……
百代是一个雄心勃勃的年轻女孩，多年来一直梦想着一个大世界。每当有机会时，她毫不犹豫地跳入状态，成为一名专属护卫。很快，应阿拉伯酋长的邀请，她开始招募波兰小姐、名人、银幕明星和模特。然而，这个难以接近、奢华的世界很快就会显露出其黑暗的一面。
也不知是玉呢，还是石头，用黑线穿着，阵阵沁凉通过手心传向全身经脉。
There is no end of good gifts-the gifts given to players by Gao Xi, the "Reaper" who died at the end of his life, should be used on bloody miners. Use this device to create 5 bloody ghouls, and then take the ghouls to Gao Xi.
