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1.This picture will arouse much attention and great concern on the social media for its informative and thought-provoking implication.
2.This picture will trigger heated discussion among college students for revealing the common dilemma facing many of them.
3.This picture will trigger heated discussion among college students for the common and shared feeling that they are enjoying.
4.This picture may arouse common emotional response from college students and trigger a heated discussion among them.
从颜色上就可以看出区别，第一句都是红的，就是普适性很好，背了一句可以用到几乎所有看图作文中，但是这样相关性就不好了。
第二句和第三句相对而言就好很多了。绿色部分就是相关性的部分，也就是只有这篇文章才能用到的。用到其他地方就不合适的内容。
第四句就把普适性和相关性结合的更好了。