题目：
4."No field of study can advance significantly unless outsiders bring their knowledge and experience to that field of study."
题目翻译：
如果没有来源于其他领域的知识和经验，没有一个研究领域会取得显著的进步。
关键词分析：
虽然这道题目里面没有什么很深奥、容易引起误解的单词，但是把几个主要单词（短语）的确切意思搞清楚了，对于最后的成文还是很有好处的。
（1）outsider
网络上查询 outsider在 英文的定义结果：
· foreigner: someone who is excluded from or is not a member of a group
这个词其实很简单，这里只是再明确一下。
（2）advance
网络上查询 advance在 英文的定义结果：
· promote: contribute to the progress or growth of; "I am promoting the use of computers in the classroom"
· progress: develop in a positive way; "He progressed well in school"; "My plants are coming along"; "Plans are shaping up"
· develop further; "We are advancing technology every day"
· improvement: a change for the better; progress in development
· promote: give a promotion to or assign to a higher position; "John was kicked upstairs when a replacement was hired"; "Women tend not to advance in the major law firms"; "I got promoted after many years of hard work"
· progress: the act of moving forward toward a goal
· A scientific or social improvement achieved by a side.
很简单，原意是“向前”，那么联系到学习、研究领域，就是进展、发展。
（3）significantly
网络上查询 significantly在 英文的定义结果：
· in a statistically significant way; "the two groups differed significantly"
· in a significant manner; "our budget will be significantly affected by these new cuts"
· importantly: in an important way or to an important degree; "more importantly, Weber held that the manifold meaning attached to the event by the social scientist could alter his definition of the concrete event itself"
这个词是要注意下的，因为题目里有，和没这个词意思上就会差很多。解释为重大的、突出的。
题目分析：
这道题目很简短，只有一句话：No field of study can advance significantly unless outsiders bring their knowledge and experience to that field of study，前后两个分句用转折连词“unless”连接。“unless”这个次本身理解起来并没有任何困难，因此它的作用要拿到题目里来一起分析。
这道题目考虑的是研究领域取得进步和发展的问题，那么 感谢您阅读《GRE作文考试Issue4详解 》一文，留学群(liuxuequn.com)编辑部希望本文能帮助到您。