1. the act of making something smaller in size, amount, or degree
使某物在尺寸、數量或程度上變小的行為
The company announced a significant reduction in its workforce.
該公司宣布大幅削減其勞動力。
We need to focus on the reduction of plastic waste.
我們需要專注於減少塑膠廢棄物。
Reduction Meaning（定義、用法、例句與發音）
reduction
noun
快速理解
What does "Reduction" mean?What are 2-3 core uses of "Reduction"?
指數量、程度、尺寸或價格的減少或降低。
- 1
數量/程度的減少
EN: a reduction in the number of employees
翻譯: 員工數量的減少
- 2
尺寸/規模的縮小
EN: the reduction of a complex problem to a simple one
翻譯: 將複雜問題簡化為簡單問題
- 3
價格/費用的降低
EN: a 20% price reduction during the sale
翻譯: 促銷期間20%的價格減免
- 4
化學/科學中的還原
EN: a chemical reaction involving the reduction of iron ore
翻譯: 涉及鐵礦石還原的化學反應
小提醒：在商業或日常語境中，'reduction' 通常指價格或數量的『減少』；但在科學（如化學）領域，它特指『還原』反應，意思完全不同，需根據上下文判斷。
發音（How to Pronounce "Reduction" in English）
How to pronounce "Reduction" in English?"Reduction" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Reduction" from YouTube Videos
Sebastian Wernicke: 1000 TEDTalks, 6 words
TED
“I mean, that's the essence of it all. Now I had my nine groups, but I mean it's already quite a reduction.”
(1 out of 21)
Definitions（定義）
What are the definitions of "Reduction"?How does "Reduction" change by context?
2. the amount by which something is made smaller
某物被減少的數量
Customers can enjoy a 20% price reduction on all items this week.
本週顧客可享受所有商品八折的價格減免。
The new policy led to a reduction of 15% in energy consumption.
新政策使能源消耗降低了15%。
3. the process of simplifying a complex problem or substance to a simpler form
將複雜問題或物質簡化為更簡單形式的過程
The reduction of the complex theory into a simple diagram helped students understand.
將複雜理論簡化為圖表有助於學生理解。
Chemical reduction is a key step in this manufacturing process.
化學還原是這個製造過程中的關鍵步驟。
4. a version of something, such as a piece of music or a map, that has been made smaller or less detailed
某物（如樂曲或地圖）經過縮小或簡化的版本
The orchestra played a reduction of the symphony for a smaller ensemble.
管弦樂團演奏了為小型樂團改編的這首交響樂縮編版。
This is a reduction of the original detailed map, showing only major roads.
這是原始詳細地圖的簡化版，只顯示主要道路。
Grammar & Patterns（句型）
What are common sentence patterns for "Reduction"?How to make natural sentences with "Reduction"?
| Pattern | Meaning | Example |
|---|---|---|
| reduction in + noun | (數量、程度上的) 減少 | There has been a significant **reduction in** noise levels. (噪音水平已有顯著降低。) |
| reduction of + noun | (對某物的) 削減、降低 | The **reduction of** greenhouse gases is crucial. (溫室氣體的削減至關重要。) |
| a + adjective + reduction | 一個…的減少 | We saw **a sharp reduction** in costs. (我們看到成本急遽下降。) |
| lead to / result in a reduction | 導致減少 | The new policy **resulted in a reduction** of waste. (新政策導致了廢棄物的減少。) |
| at a reduction | 以減價、以折扣價 | The item was sold **at a reduction**. (該商品以折扣價出售。) |
用法說明
How is "Reduction" different from similar structures?What usage mistakes are common with "Reduction"?
reduction in vs reduction of
- reduction in + 名詞：通常用於描述某個事物（如數量、規模、程度）的減少。強調「在...方面」的減少。
- reduction of + 數值/百分比：通常用於具體說明減少的幅度或數量。
- reduction of + 名詞：有時也指「對...的削減」，但更常與具體數值連用。 EN: The company announced a significant reduction in staff. 翻譯: 公司宣布大幅裁員。
EN:The new policy led to a reduction of 20% in energy costs.
翻譯:新政策使能源成本降低了20%。
總結建議
一般來說，描述「某方面的減少」用 reduction in，而說明「具體減少的數值」則用 reduction of。
易混淆對比
What is the difference between "Reduction" and similar words?How to choose "Reduction" vs alternatives?
reduction vs decrease
「reduction」通常指有意識、有計畫地減少數量或規模，常涉及具體行動或措施；「decrease」則泛指數量、程度或強度的下降，可以是自然發生的過程。
reduction vs discount
「reduction」指價格、費用或數量的降低；「discount」特指商品或服務價格的折扣，通常是百分比或固定金額的優惠。
reduction vs diminution
「reduction」是常用詞，指主動或有計畫的減少；「diminution」是較正式的詞彙，常指價值、重要性或強度的減弱或縮小。
口語用法
How is "Reduction" used in spoken English?What is the spoken vs formal difference for "Reduction"?
引述
在對話中，當引述或轉述他人關於減少某事物的說法時，常會使用這個詞。 EN: She was talking about a reduction in staff, which made everyone nervous. 翻譯: 她當時在談論人員縮編的事，讓大家都很緊張。
EN:So, the boss mentioned a possible budget reduction for next quarter.
翻譯:所以，老闆提到了下個季度預算可能會有削減。
語氣強調
為了強調減少的幅度或重要性，說話者可能會加重語氣或使用特定的副詞。 EN: That's a significant reduction — we're talking about 50% off! 翻譯: 那可是大幅度的減價 — 我們說的是打五折！
EN:There's been a drastic reduction in pollution levels since the new policy.
翻譯:自從新政策實施後，污染程度有了急遽的下降。
停頓填充
在組織思緒或尋找合適字眼時，可能會用這個詞作為短暫的停頓或填充。 EN: The plan involves... a reduction in operational costs, among other things. 翻譯: 這項計畫涉及…營運成本的降低，以及其他事項。
EN:We need to aim for, you know, a reduction of waste in the process.
翻譯:我們需要朝著，你知道的，減少流程中的浪費這個目標努力。
注意：以上口語用法在正式書寫或學術報告中應避免，應使用更精確、完整的句子結構來表達。
常見短語
What common collocations use "Reduction"?What fixed phrases with "Reduction" should I remember?
reduction in
reduction in [something]
在...方面的減少
cost reduction
[adjective] cost reduction
成本削減
risk reduction
risk reduction
風險降低
reduction of
reduction of [something]
對...的減少/縮減
price reduction
price reduction
降價
significant reduction
[a/an] significant reduction
顯著減少
reduction strategy
reduction strategy
削減策略
常見錯誤
What are common mistakes with "Reduction"?Which "Reduction" sentences look correct but are wrong?
×There is a reduction of 20% in the price.
✓There is a 20% reduction in the price.
在英文中，百分比通常直接放在名詞 'reduction' 前面作為修飾語，而不是使用 'of' 來連接。
×We need to make a reduction for our expenses.
✓We need to make a reduction in our expenses.
動詞 'make' 與 'reduction' 搭配時，後面通常接介系詞 'in' 來表示在哪方面進行減少，而不是用 'for'。
×The reduction of plastic waste is important.
✓The reduction in plastic waste is important.
當 'reduction' 表示數量、程度或規模上的減少時，通常使用介系詞 'in'。使用 'of' 可能會讓人誤解為是『塑料廢棄物的減少部分』，而非『減少』這個動作或過程。
×He got a reduction salary last month.
✓He got a salary reduction last month.
'Reduction' 作為名詞修飾另一個名詞時，通常放在前面，形成複合名詞，例如 'salary reduction'、'price reduction'。不應將 'reduction' 放在後面當作形容詞使用。
×They discussed about the reduction plan.
✓They discussed the reduction plan.
動詞 'discuss' 是及物動詞，後面直接接受詞，不需要加介系詞 'about'。這是一個常見的動詞用法錯誤。
×A big reduction happened in our budget.
✓There was a significant reduction in our budget.
雖然 'happen' 語法上沒錯，但描述『發生減少』時，使用 'There was a reduction...' 或 'A reduction occurred...' 更為自然和常見。'Big' 用於口語，在正式或書面語中，'significant'、'substantial'、'major' 是更好的選擇。
詞形變化
What are the word forms of "Reduction"?What are tense/participle forms of "Reduction"?