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故事发生在改革开放的前夕,中国陕北山区的一个村庄里。高家林是村里为数不多的读过高中的青年。他毕业后被分配在村里的小学担任教师。不顾村里人的闲言碎语,他和村里纯朴善良的姑娘刘巧珍,自由恋爱。好景不长,同村青年高三星一直暗恋着巧珍,并利用其父的职权,顶替家林成为一名乡村教师。但巧珍并没有放弃对家林的爱情,反而在生活中更加关心家林.这使三星对家林产生了强烈的嫉恨,家林也因被三星顶替了教师。创作背景：但他这次来不及惊呼，一刀子已经砍来，瞪眼的功夫，身首分离。括号内为演员IG账号电影《爱·之痕》分别讲述了以周全、陆青青、王一鸣、琳琅“铁四角”为主线，从青葱到青年，四人以不同性格展现着三段不同的爱情形态，也想通过这三段感情，来表达爱情里的那些令人怀念的时光，心痛的刹那，遗憾的错过，无奈的选择，这些种种加杂在一起，让我们觉得，就算失恋，也是一种痛苦的浪漫，是一种值得去追忆的痛楚。忍不住转头，低声问王穷：王兄，可看出蹊跷没？王穷摇头。In essence, classification is to find the common points and differences of things in our thoughts. It is the basic method and ability for us to know and understand the world. On the basis of classification, it is possible to judge and reason, and to form concepts and make decisions. Classification requires comprehensive demonstration activities such as association, analogy, reasoning and extension, and is the basic cell of thinking.