Word · CEFR B2 · Frequency #7733
deduce
推断；推论；演绎
to conclude something from the available facts or evidence; to infer
- 1.
To reach (a conclusion) by applying rules of logic or other forms of reasoning to given premises or known facts.
推论；演绎出；[法] 推断；推出；演绎
In use
From the muddy footprints on the floor, the detective deduced that someone had entered through the back door.
Based on the weather forecast and the dark clouds, I deduce that it will rain this afternoon.
By comparing the handwriting on the two letters, the expert deduced that they were written by the same person.
deduce sth from sth
常用于表示从已知信息中得出结论。
We can deduce the truth from the evidence.
我们可以从证据中推断出真相。
deduce that + clause
后接 that 从句，表示推断出的具体内容。
From the data, we deduced that the experiment failed.
从数据中我们推断出实验失败了。
deduce sth
直接跟名词，省略了信息来源，常见于非正式或语境明确时。
Sherlock Holmes deduced the solution.
夏洛克·福尔摩斯推断出了答案。
Verb forms
base deduce · third person deduces · -ing deducing · past deduced · past participle deduced
Common mistakes
From the data, we can induce that the experiment failed.From the data, we can deduce that the experiment failed.
学习者混淆了deduce与induce。deduce意为‘推论’（基于证据推理），而induce意为‘诱导’或‘归纳’（在逻辑中特指归纳推理），在表达‘推断出’时应用deduce。
We deduced by the evidence that he was guilty.We deduced from the evidence that he was guilty.
介词by使用错误。与deduce搭配的介词是from，表示‘从…中推断出’，而by通常表示方法或手段，此处应用from。
Connections
Collocations
- deduce from
- 从…推断
- We can deduce from the evidence that he was lying.我们可以从证据推断出他在撒谎。
- deduce that
- 推断出…
- The detective deduced that the murderer was left-handed.侦探推断出凶手是左撇子。
- deduce a conclusion
- 得出结论
- It took us a while to deduce the correct conclusion.我们花了一些时间才得出正确的结论。
- be deduced from
- 从…被推断出
- This theory can be deduced from the available data.这个理论可以从现有数据中推断出来。
Pop culture & quotes
- I have deduced that you have been to Afghanistan.
- 我已经推断出你去过阿富汗。Sherlock Holmes deduces clues that others miss.夏洛克·福尔摩斯推断出别人忽略的线索。
Learner notes
Memory Tip
联想 'de' 和 'duce'（引导），'deduce' 就是引导推理出结论。
Context & Register
语域：formal 常见场景：academic writing、logical reasoning、scientific discourse deduce 通常用于正式场合，如学术论文、逻辑论证等，在日常口语中较少使用。
Pronunciation & Spelling
All these words end with -duce and share the same stressed vowel and following sounds in standard English (IPA /djuːs/ or /duːs/). They are true rhymes.
Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.