考研英语复习过程中，一些又长又难的词汇总是让同学们头疼。海天考研小编整理了一些常考的长难词，希望对大家有所帮助。

understanding [ʌndə/stændiŋ] n.①理解，理解力;②谅解;a.了解的，通情达理的

[真题例句] And it is in the public schools that we find the full expression of society’s understanding (n.①) — the knowledge, hopes, and fears that are passed on to the next generation.[1994年阅读3]

[例句精译] 正是在公立学校里我们感受到了社会知性的充分体现——传授给下一代的知识、希望和恐惧。

underestimate [ʌndər/estimeit] v.低估

[真题例句] Some individuals would therefore not have been caught, since no baited hooks would have been available to trap them, leading to an underestimate of fish stocks in the past.[2006年阅读3]

[例句精译] 因为没有带饵的鱼钩来捕捉它们，一些个体因此没有捕捉到，这导致了过去对鱼类数量的低估。

unenlightened [ʌnin/laitnd] a.无知的，落后的

[真题例句] The goal of all will be to try to explain to a confused and often unenlightened citizenry that there are not two equally valid scientific theories for the origin and evolution of universe and life.[1996年阅读5]

[例句精译] 所有这些书的目的是试图告诉那些迷惑而且常常是还不开通的人：就宇宙和生命的起源与发展问题而言，不可能存在两种都成立的科学理论。

unfortunately [ʌn/fɔːtʃənətli] ad.不幸地

[真题例句] Why has inflation proved so mild? The most thrilling explanation is, unfortunately, a little defective.[1997年阅读5]

[例句精译] 通货膨胀为何如此的和缓?可惜的是，这最令人震惊的解释有一点缺陷。