1. the process of reaching a conclusion based on logic and evidence
基於邏輯和證據得出結論的過程
Sherlock Holmes used deduction to solve the mystery.
福爾摩斯運用推理來解開謎團。
Her deduction about the suspect's motive was correct.
她對嫌疑人動機的推斷是正確的。
Deduction Meaning（定義、用法、例句與發音）
deduction
noun
快速理解
What does "Deduction" mean?What are 2-3 core uses of "Deduction"?
「deduction」主要有兩種核心含義：邏輯推理與金額扣除。
- 1
邏輯推理
EN: the process of reaching a conclusion based on general principles or evidence
翻譯: 根據一般原則或證據得出結論的過程。
- 2
金額扣除
EN: the subtraction of an amount from a total sum
翻譯: 從總額中減去一部分金額。
- 3
推斷結果
EN: a conclusion that is reached through the process of reasoning
翻譯: 透過推理過程得出的結論。
小提醒：在財務或稅務情境中，「deduction」通常指「扣除額」，而非推理。例如「tax deduction」是「稅額扣除」，不是「稅務推理」。
發音（How to Pronounce "Deduction" in English）
How to pronounce "Deduction" in English?"Deduction" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Deduction" from YouTube Videos
Stewart Brand: Building a home for the Clock of the Long Now
TED
“Listen, we'll counter: How about zero? (Laughter), And we're a non-profit foundation. you can give us the property and take a hell of a tax deduction (Laughter).”
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Definitions（定義）
What are the definitions of "Deduction"?How does "Deduction" change by context?
2. an amount subtracted from a total, especially from income or pay
從總額中扣除的金額，尤指從收入或薪水中
There are several tax deductions available for homeowners.
屋主可以享有幾項稅務扣除額。
The insurance premium is a monthly deduction from my salary.
保險費是每月從我薪水中扣除的款項。
3. the act of taking away or subtracting something
拿走或減去某物的行為
The deduction of points for late submission is clearly stated in the rules.
規則中明確說明了遲交會被扣分。
The referee made a deduction from the team's score due to a foul.
裁判因犯規而從該隊分數中扣分。
4. a conclusion reached by the process of deduction
透過推理過程得出的結論
All my deductions pointed to the same person.
我所有的推論都指向同一個人。
Based on the evidence, the detective's deduction was that it was an inside job.
根據證據，偵探的推斷是這是一起內部人員所為的案件。
Grammar & Patterns（句型）
What are common sentence patterns for "Deduction"?How to make natural sentences with "Deduction"?
| Pattern | Meaning | Example |
|---|---|---|
| deduction + from + noun | 從…得出的推論 | The detective made a logical deduction from the evidence. (偵探從證據中得出了一個合乎邏輯的推論。) |
| make a deduction | 進行推論 | It's impossible to make a deduction without all the facts. (沒有全部事實，不可能進行推論。) |
| by deduction | 透過推論 | She arrived at the answer by deduction, not by guessing. (她是透過推論，而非猜測，得出答案的。) |
| tax deduction | 稅務扣除額 | Charitable donations can be claimed as a tax deduction. (慈善捐款可以申報為稅務扣除額。) |
| a logical deduction | 一個合乎邏輯的推論 | His conclusion was a logical deduction based on the data. (他的結論是基於數據的一個合乎邏輯的推論。) |
用法說明
How is "Deduction" different from similar structures?What usage mistakes are common with "Deduction"?
deduction from vs deduction of
- deduction from 通常指從某個具體的來源、前提或證據中進行推論或扣除。
- deduction of 則常指扣除某個具體的項目、金額或部分，或用於描述推論的內容本身。
- 在邏輯和推理的語境中，deduction from 強調推理的起點（前提），而 deduction of 可強調推理得出的結論。
- 在財務或數學語境中，deduction from 指從總額中扣除，deduction of 指被扣除的具體數額。 EN: His brilliant deduction from the scattered clues solved the case. 翻譯: 他從零散的線索中做出的精彩推論破解了案件。
EN:The deduction of a large sum from his account was unauthorized.
翻譯:從他帳戶中扣除的那筆巨款是未經授權的。
EN:The detective made a logical deduction from the witness statements.
翻譯:偵探從證人的陳述中做出了合乎邏輯的推斷。
EN:The deduction of taxes is mandatory for all employees.
翻譯:為所有員工扣除稅款是強制性的。
總結建議
在表示「從…推論/扣除」時用 deduction from，在表示「…的推論」或「扣除的項目/金額」時則常用 deduction of。
易混淆對比
What is the difference between "Deduction" and similar words?How to choose "Deduction" vs alternatives?
deduction vs inference
deduction 是從普遍原則推導出特定結論的邏輯過程，強調必然性；inference 則是基於證據或前提得出結論的廣義推論，可能包含演繹或歸納。
deduction vs subtraction
deduction 在邏輯或推理中指推導過程，在財務上指扣除額；subtraction 專指數學中的減法運算。
deduction vs induction
deduction（演繹）是從一般到特殊的推理，結論具必然性；induction（歸納）是從特殊到一般的推理，結論具或然性。
口語用法
How is "Deduction" used in spoken English?What is the spoken vs formal difference for "Deduction"?
引述
在對話中，當你轉述他人的推論或結論時，常用「deduction」來指稱那個想法。 EN: So your deduction is that the meeting got cancelled because no one showed up? 翻譯: 所以你的推論是因為沒人出現，所以會議取消了？
EN:I followed her deduction, and it actually led me to the right answer.
翻譯:我按照她的推斷去做，結果真的找到了正確答案。
語氣強調
在非正式對話中，使用「deduction」可以強調思考過程的邏輯性，帶有一點自信或戲劇化的語氣。 EN: Well, after careful deduction, I've figured out who ate the last cookie. 翻譯: 嗯，經過仔細推斷，我已經知道是誰吃了最後一塊餅乾了。
EN:That's not a guess—it's a logical deduction!
翻譯:那不是猜測——那是合乎邏輯的推論！
停頓填充
有時在組織思緒或解釋推理步驟時，會用「deduction」作為一個短暫的停頓點，引出接下來的結論。 EN: My deduction... is that we should probably start over. 翻譯: 我的推斷是…我們大概應該重頭來過。
EN:And the final deduction? We need more data.
翻譯:而最終的推論呢？我們需要更多資料。
正式寫作注意：在學術或正式商業寫作中，應避免將「deduction」用於口語化的停頓或戲劇化強調。建議使用更中性的詞語如「conclusion」、「inference」或直接陳述推論過程，以保持語氣的客觀與嚴謹。
常見短語
What common collocations use "Deduction"?What fixed phrases with "Deduction" should I remember?
tax deduction
noun + deduction
稅務扣除額
make a deduction
verb + a + deduction
進行推斷/扣除
logical deduction
adjective + deduction
邏輯推論
payroll deduction
noun + deduction
薪資扣款
by deduction
by + deduction
透過推論
standard deduction
adjective + deduction
標準扣除額
deduction of points
deduction + of + noun
扣分
常見錯誤
What are common mistakes with "Deduction"?Which "Deduction" sentences look correct but are wrong?
×I made a deduction that he is late because of the traffic.
✓I made the deduction that he was late because of the traffic.
當指涉一個特定的、已做出的推論時，通常使用定冠詞 'the' 而非不定冠詞 'a'。此外，在報告推論內容時，時態應與主句保持一致（這裡用 'was' 而非 'is'）。
×Her deduction about the market trend were correct.
✓Her deduction about the market trend was correct.
'Deduction' 作為可數名詞時是單數形式。即使推論的內容涉及複數概念，主詞 'deduction' 本身仍需要單數動詞 'was'。
×He used deduction to solve a math problem.
✓He used deductive reasoning to solve the math problem.
在描述使用邏輯推理的過程或方法時，更地道的說法是 'deductive reasoning' 或 'deductive logic'。單獨使用 'deduction' 在此語境下較不自然，且可能與「扣除額」混淆。
×After several deductions, we finally know the answer.
✓After several rounds of deduction, we finally arrived at the answer.
'Deduction' 作為推理過程時通常是不可數名詞。若要表示多次或反覆的推理過程，應使用 'rounds of deduction'、'process of deduction' 或 'series of deductions'（後者將 deduction 視為具體的推論結果）。原句用法不自然。
×My salary after tax deduction is higher than before.
✓My salary after tax deductions is higher than before.
在財務或稅務情境中，'deduction' 意指「扣除額」，通常是可數名詞。由於稅款扣除通常包含多個項目（如保險、退休金等），應使用複數形式 'deductions' 更為常見且準確。
詞形變化
What are the word forms of "Deduction"?What are tense/participle forms of "Deduction"?