1. a distinct part or branch of a nation's economy or society
（經濟或社會的）部門，領域
She works in the private sector.
她在私營部門工作。
The technology sector is growing rapidly.
科技領域正在快速成長。
The government is investing in the agricultural sector.
政府正在投資農業部門。
Sector Meaning（定義、用法、例句與發音）
sector
noun
快速理解
What does "Sector" mean?What are 2-3 core uses of "Sector"?
「sector」主要指一個較大整體中的特定部分或領域。
- 1
經濟/社會領域
EN: the private sector
翻譯: 私營部門
- 2
幾何圖形
EN: a sector of a circle
翻譯: 扇形
- 3
軍事/防禦區域
EN: a sector of the front line
翻譯: 戰區防線的一段
- 4
電腦儲存區
EN: a bad sector on a hard disk
翻譯: 硬碟上的壞軌
小提醒：在商業或經濟語境中，「sector」常指產業或經濟活動的類別（如科技業、服務業），而非僅指公司內部的「部門」（department）。
發音（How to Pronounce "Sector" in English）
How to pronounce "Sector" in English?"Sector" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Sector" from YouTube Videos
Spain counts the cost of 'nightmare' wildfire summer | BBC News
BBC News
“A farmers association has estimated that losses in the sector across the country this summer amount to at least €600 million because of animals killed and land and property destroyed.”
(1 out of 28)
Definitions（定義）
What are the definitions of "Sector"?How does "Sector" change by context?
2. an area or portion that is distinct from others
區域，地段
The northern sector of the city was hit hardest by the storm.
城市的北部區域受風暴影響最嚴重。
The rebels control a large sector of the country.
叛軍控制了該國的一大片區域。
Please report to the designated sector for registration.
請到指定區域報到。
3. a part of a circle enclosed by two radii and an arc
（數學的）扇形
Calculate the area of the shaded sector.
計算陰影扇形的面積。
A circle can be divided into several equal sectors.
一個圓可以被分成幾個相等的扇形。
4. a subdivision of a military position or front
（軍事）防區，戰區
The general was responsible for the entire western sector.
這位將軍負責整個西部防區。
Enemy forces were spotted moving into our sector.
發現敵軍正進入我方戰區。
Grammar & Patterns（句型）
What are common sentence patterns for "Sector"?How to make natural sentences with "Sector"?
| Pattern | Meaning | Example |
|---|---|---|
| the + sector | 特定部門、領域 | The manufacturing sector is facing a labor shortage. (製造業正面臨勞動力短缺。) |
| a + sector of + noun | 某個領域的一部分 | He works in a sector of the financial industry. (他在金融業的一個部門工作。) |
| in/within the + sector | 在該領域/行業內 | There have been many innovations within the technology sector. (科技領域內已有許多創新。) |
| public/private sector | 公共/私營部門 | She has experience in both the public and private sectors. (她在公共和私營部門都有經驗。) |
| sector + verb (e.g., grows, declines) | 領域（增長、衰退等） | The retail sector declined sharply last quarter. (零售業上一季度急劇衰退。) |
| across + multiple + sectors | 跨越多個領域 | The policy will impact businesses across multiple sectors. (這項政策將影響跨越多個領域的企業。) |
用法說明
How is "Sector" different from similar structures?What usage mistakes are common with "Sector"?
the public sector vs the private sector
- the public sector 指由政府擁有、資助或營運的組織和服務，例如政府部門、公立學校、公立醫院。其核心目標通常是提供公共服務，而非營利。
- the private sector 指由個人或公司擁有和營運的企業，其核心目標通常是創造利潤。這包括從小型商店到大型跨國公司的所有商業實體。
- 這兩個詞組通常對比使用，以區分經濟活動中由政府主導的部分和由市場主導的部分。
- 在討論經濟政策、就業或服務提供時，明確區分所指的是哪個 sector 至關重要。
對比例句： EN: She has worked in the public sector her entire career, first as a teacher and then in city government. 翻譯: 她的整個職業生涯都在公營部門工作，先是當老師，後來又在市政府任職。
EN:Innovation in the technology sector is primarily driven by the private sector.
翻譯:科技領域的創新主要由私營部門推動。
總結建議
在英文寫作或討論中，欲表達經濟或社會的不同組成部分時，應根據所有權和營運目標明確使用 the public sector（公營）或 the private sector（私營）。
易混淆對比
What is the difference between "Sector" and similar words?How to choose "Sector" vs alternatives?
sector vs industry
「sector」通常指經濟或社會中一個廣泛的、概念性的部門（如公營部門），而「industry」則指更具體、從事特定商業活動的行業（如汽車業）。
sector vs area
「sector」常指有明確劃分或專業性的領域（如經濟部門），而「area」泛指一個範圍或區域，可以是地理或抽象概念。
sector vs segment
「sector」指一個較大的、獨立的部門或領域，而「segment」通常指一個整體中被分割出來的較小部分或區塊。
口語用法
How is "Sector" used in spoken English?What is the spoken vs formal difference for "Sector"?
引述
在對話中，當引述或轉述他人對某個領域或群體的看法時，常用 "the ... sector" 來指稱。 EN: He said the tech sector is booming right now. 翻譯: 他說科技業現在正蓬勃發展。
EN:Everyone's talking about how the public sector needs reform.
翻譯:大家都在討論公部門需要改革。
語氣強調
為了強調討論的範圍或特定部分，會在 "sector" 前加上形容詞或所有格，使焦點更明確。 EN: It's the private sector that's really driving innovation. 翻譯: 真正推動創新的是私營部門。
EN:Our main concern is the manufacturing sector in the north.
翻譯:我們主要關心的是北部的製造業。
停頓填充
在組織思緒或尋找合適詞語時，有時會用 "in the ... sector" 作為短暫的填充語，引出後續更具體的說明。 EN: The challenges, especially in the agricultural sector, are quite complex. 翻譯: 這些挑戰，特別是在農業部門，相當複雜。
EN:We've seen growth, primarily in the service sector, over the last quarter.
翻譯:我們看到了成長，主要是在服務業，在過去一季。
正式寫作注意：在學術或正式商業報告中，應避免將 "sector" 用於過於口語或模糊的停頓填充。建議直接、明確地指出所討論的具體產業或領域，例如使用 "the industry", "the field", 或更具體的名稱如 "the financial services industry"，以使論述更精準、專業。
常見短語
What common collocations use "Sector"?What fixed phrases with "Sector" should I remember?
public sector
adj + sector
公營部門，指由政府擁有、資助或營運的機構與服務。
private sector
adj + sector
私營部門，指由私人企業和個人擁有與營運的經濟部分。
financial sector
adj + sector
金融業，涵蓋銀行、保險、投資等與金融服務相關的行業。
service sector
adj + sector
服務業，提供無形服務（如零售、旅遊、教育）而非生產商品的經濟部門。
broadcast sector
adj + sector
廣播業，指電視、電台等廣播媒體行業。
key sector
adj + sector
關鍵部門，對經濟或社會運作至關重要的行業領域。
expand into a new sector
verb + into + sector
擴展至新領域，指企業將其業務範圍拓展到一個新的行業。
within the sector
prep + sector
在該行業/部門內，指在某個特定經濟或專業領域的範圍之內。
常見錯誤
What are common mistakes with "Sector"?Which "Sector" sentences look correct but are wrong?
×He works in the IT sector.
✓He works in the IT sector.
The sentence is grammatically correct. The common mistake is mispronouncing 'sector' as /ˈsek.tɔːr/ (like 'sect' + 'or') instead of the correct /ˈsek.tər/. Learners often stress the second syllable incorrectly.
×The government will invest more money to the agricultural sector.
✓The government will invest more money in the agricultural sector.
The preposition 'to' is incorrect when referring to investing resources within a specific area or field. The correct preposition is 'in'.
×Our company is a leader in the sectors of technology.
✓Our company is a leader in the technology sector.
Using 'sectors of' is often redundant and unnatural. It's more idiomatic to use the noun directly as an adjective before 'sector' (e.g., technology sector, finance sector).
×The economic sector is improving.
✓The economy is improving. / The industrial sector is improving.
'Economic sector' is vague and not a standard collocation. 'Economy' refers to the whole system. Use specific sector names like 'industrial sector', 'manufacturing sector', or 'financial sector'.
×I want to find a job in sector of education.
✓I want to find a job in the education sector.
The article 'the' is required before 'education sector'. Also, the structure 'sector of education' is less common than 'education sector'.
×The third sector means the third part.
✓The third sector refers to non-profit and voluntary organizations.
This is a confusion of meaning. 'The third sector' is a specific term (also called the voluntary sector or non-profit sector), not simply a numerical order. It is distinct from the public and private sectors.
詞形變化
What are the word forms of "Sector"?What are tense/participle forms of "Sector"?