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2. Expansion and development are not restricted by regions;The trigger sequence of events is from inside to outside, which is event bubbling. The following is to prevent bubblingIf I were to implement a pizza ordering system, I would definitely write the code like this, because this kind of code can be written subconsciously without consuming our brains. However, take a closer look at this code: the purpose of this method is to order pizza. However, the code for ordering pizza also needs knowledge about the production of pizza. This method must know all pizza. Worse still, if the types of pizza are to be expanded or pizza with poor sales volume are to be deleted in the future, then the code for ordering pizza will be modified. It looks very bad and should be revised. Our first step must be to separate the code for producing Pizza from the code for ordering pizza, because you should not let the code for ordering Pizza know the logic for producing pizza, but should hand over the logic for producing Pizza to a special type. In this way, we can cope with future changes-if we want to add or delete pizza, we can directly modify the producer of pizza without affecting the logic of ordering pizza.这是岛上的叔叔们自己采的。Fortunately, I was able to suck my soul last week. I sucked it to death.1938年春，“七七事变”发生六个多月后，日军占领了华北大部，大兵压境中条山，直逼中华腹地的最后一道防线——黄河天险。在黄河古道上，迎亲的队伍遭遇了日军飞机的轰炸，新娘子皇甫贞与乘坐的花轿一同坠入黄河波涛，为了报仇，新郎杨兴邦收留五名川军散兵，得到武器，并约来好友揭竿而起，拉起一支抗日武装。在共产党河东特委书记宋平的指引下，河东抗日游击队迅速发展壮大，除汉奸、端炮楼、炸机场，掩护中共干部和知名民主人士过黄河到延安，成为活跃在黄河岸边，威震四方的一支民间抗日武装，最终，杨兴邦从一个草莽好汉成长为抗日民族英雄。　　多年的荣辱与共，佳琳与张墨白的生命紧紧缠绕，同时探究家族没落的真相也越来越清晰，面对真相的揭示，她的心却愈发纠结痛苦。生活的另一面，佳琳悉心照料的妹妹无法体谅她的苦心，自甘沦落；而懦弱的姐姐也被裹挟在两大家族的争斗中，几近反目，亲情也无法弥合。