1. 演绎，推论，推出，导出，推导，推知，归算，引出，推理，推断，断定
2. 追溯，追溯根源，沿着…的路找

1. vt. & vi. 推论,演绎 determine or decide sth from general principles in relation to a particular thing, fact, or event

1. reason by deduction; establish by deduction

2. conclude by reasoning; in logic

1.推论;推断;演绎
If youdeduce something ordeduce that something is true, you reach that conclusion because of other things that you know to be true.

e.g. Alison had cleverly deduced that I was the author of the letter.
艾莉森已经聪明地推断出那封信就是我写的。
e.g. The date of the document can be deduced from references to the Civil War...
这份文件的日期可以从其中多次提到内战之处进行推断。

1. deduce在线翻译

1. 演绎：这些规范性的问题,不可能通过事实权威或权威与服从的实例得到正当化证明,而是要借助演绎(deduce)的方法,即根据权威与道德的一般原则进行推论. 沃尔夫的主要目的,就是要通过这种演绎说明,合法权威的概念与道德自主在逻辑上是不相容的,

2. 推论：定理是Theorem,是要根据基本的公理来推论(deduce)的公理是Axiom,它不需要证明,是人们的共识,是常识(Common Sense). 公理就是在一个理论系统中被默认为真的命题,而定理是根据公理或其他的真命题(定理)推导出来的真命题.

3. 推理：对于全文的理解,读者主要用总结(sum-up)、概括(outline)、归纳(induce)、推理(deduce)等思路. 四级阅读测试一般包括4篇文章的阅读,每篇后有5道选择题. 这些的类型多种多样,但归纳起来大致可分为二大类,

1. On the basis of evidence we deduced that he was guilty.
   根据这些证据我们推断他是有罪的。
2. Because there was no cloud, he deduced that it was going to be a cold night.
   由于天上无云,他推断将会有一个寒冷的夜晚。

1. The police were able to deduce where the fugitive was hiding.
   警方成功地推断出那逃亡者躲藏的地方。

deduce from (v.+prep.)

从(所给事实)推论出… reach (an answer) by reasoning from (given facts)
deduce sth from sth

What do you deduce from the facts?

你从事实中推论出什么?

We can deduce a conclusion from the premises.

我们可以从这个前提推出结论。

deduce from sb/sth that-clause

I deduce from the small crowd that the speaker is not very popular.

从这一小点儿听众人数来看,这个演讲者声望不很高。

I deduced from the noise that the dog had woken up.

我从这些噪音中判断这只狗醒了。

From her conversation,I deduced that she has a large family.

我从她的谈话中推断出她有很多孩子。

• Ye case once graunted, ye deduce your conclusion very surelye.

  出自：Sir T. More

• From that..I deduce that you are a painter in oils.

  出自：N. Marsh

• The existence of the antielectron was first deduced theoretically by..Dirac.

  出自：S. Weinberg

1. deduce的基本意思是“推论”“演绎”,指在证据的基础上通过有条理的逻辑思维,从一般原则中得出特殊推断。
2. deduce是及物动词,接名词或名词从句作宾语。
3. deduce常接介词from,表示“从…推断出”。

deduce, conclude, gather, infer, judge

这几个词的共同意思是“推断”。其区别在于:infer指从不太充分的论据或前提中推断出结论; conclude指通过推理或判断而得出结论; deduce指有充分根据地推论或逻辑上地演绎; gather指综合事物得出印象或感想等; judge通常指经过仔细鉴定或评价之后作出的决断。例如:

From his a manner of dress and style of living,I gather that he is man of considerable means.从他的穿着式样和生活方式,我揣想他是个相当富有的人。

She had concluded from that her grandmother did not like her.她已从那一点得出结论,断定她祖母不喜欢她。

If you saw a doctor leaving a house, you might deduce the fact that someone in the house was ill.你要是看到医生从一家出来,你就可以推想那家有人生病。

We see smoke and infer fire.我们看到烟,从而推断有火。

Judging from what you said, they ought to succeed.从你说的情况看来,他们应当能成功。

deduce, deduct

这组词的区别是：deduce的意思是“演绎、推理”,而deduct的意思是“扣除”。两词意思截然不同,可它们的名词形式却都是deduction。

infer，deduce，conclude，gather，judge

这些动词均含“推断”之意。

infer指从已提供的论据或从已接受的前提出发而推断出的结论。

deduce指有充分根据的推论，也指逻辑学上的演绎。

conclude指得出符合逻辑的结论。

gather指从听到的情况推测、判定。

judge多指经过仔细鉴定或评价之后作出决断。