考研英语重在基础，建议广大考生在了解考研英语大纲的前提下，首先积累英语词汇量，并通过做阅读理解、翻译、写作等练习在词义方面加以提升，然后再考虑学习掌握答题技巧。当然，我们知道英语知识的复习是一个长期积累的过程。让我们跟随何凯文老师的每日一句。所谓：不积跬步，无以至千里;不积小流，无以成江海。坚持就是胜利!

The physicists rightly dreads precise argument,since an argument that is convincing only if it is precise loses all its force if the assumptions on which it is based are slightly changed, whereas anargument that is convincing though imprecise may well be stable under small perturbations of its underlying assumptions.

词汇突破：

dread vt. 害怕，担心;

Precise adj. 精确的

Whereas conj. 鉴于;然而;反之

Perturbation n. <正>忧虑;不安;烦恼;

n. 小的变化

主干识别：The physicists rightly dreadsprecise argument

物理学家正当地害怕精确的论断。

= 物理学家害怕(做出)精确的论断是正确的。

其他成分：since an argument that isconvincing only if it is precise loses all its force if the assumptions onwhich it is based are slightly changed, whereas an argument that is convincingthough imprecise may well be stable under small perturbations of its underlyingassumptions..

状语从句

微观分析：

1. since an argument that isconvincing only if it is precise loses all its force if the assumptions onwhich it is based are slightly changed.

an argumentloses all its force 从句中的主干

thatis convincing only if it is precise 定语从句修饰argument

if theassumptions are slightly changed 状语从句

on which it is based 定语从句修饰assumptions, which 指代argument ;

连在一起翻译，先翻状语从句

如果这个论断所基于的假设发生了细微变化的话，那么这个只有在精确的情况下才能有说服力的论断就会失去其全部的说服力。

=如果一个只有在精确的情况下才能有说服力的论断所基于的假设发生了细微变化的话，那么这个论断就会失去其全部的说服力

解释一下：由于要先翻状语从句，所以先把定语从句的信息先说了，反正都是修饰同一个argument , 这样可以更通顺，更符合中文习惯。

2. whereas an argument that is convincing thoughimprecise may well be stable under small perturbations of its underlying assumptions.

an argument may well be stable 主干

thatis convincing though imprecise 定语从句

under small perturbations of its underlying assumptions. .状语

(its underlying assumptions= assumptionson which it is based这个替换牛吧!)

而一个尽管不精确但是却令人信服的论断，即使在其基于的理论发生轻微变化的时候，依旧是稳定的。

参考译文： 物理学家害怕(做出)精确的论断是正确的。因为，如果一个只有在精确的情况下才能有说服力的论断所基于的假设发生了细微变化的话，那么这个论断就会失去其全部的说服力，而一个尽管不精确但是却令人信服的论断，即使在其基于的理论发生轻微变化的时候，依旧是稳定的。