为给您2018考研英语复习助力，新东方在线为大家整理了一些考研英语的长难句资料参考，英语的复习像盖楼应该从基础开始复习，希望大家平时抽出一点时间读一读记一记。
The ability to distinguish between fact and opinion, and to constantly question what we call knowledge, is vital to human progress, and something we cannot afford to let slip.
长难句解析：
词汇突破：
1.Distinguish 区分
2.Opinion 观点
3.Constantly 持之以恒地
4.Vital 至关重要的
5.Human progress 人类进步
6.Let slip 错过;放开
确定主干：The ability is vital to human progress
(The ability) is something (we cannot afford to let slip定语从句)
切分成分：to distinguish between fact and opinion, and to constantly question what we call knowledge (ability的定语)
参考译文：区分事实和观点和对我们所谓的知识保持怀疑的能力对于人类进步至关重要，这种能力也是我们无法忽视的东西。
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