1. a real or imagined line that marks the limit or edge of something
標示某物界限或邊緣的真實或想像的線
The river forms the boundary between the two countries.
這條河構成了兩國之間的邊界。
They walked along the boundary of the forest.
他們沿著森林的邊界行走。
Boundary Meaning（定義、用法、例句與發音）
boundary
noun
快速理解
What does "Boundary" mean?What are 2-3 core uses of "Boundary"?
指分隔兩個區域、範圍或狀態的界線或限制。
- 1
地理界線
EN: a real or imaginary line that marks the edge or limit of an area
翻譯: 標示一個區域邊緣或界限的真實或想像的線。
- 2
抽象範圍
EN: the limit of what is acceptable, possible, or appropriate
翻譯: 可接受、可能或適當的範圍限制。
- 3
領域分界
EN: a dividing line between different subjects, areas of activity, or fields of knowledge
翻譯: 不同學科、活動領域或知識範疇之間的分界線。
- 4
板球術語
EN: in cricket, a hit of the ball to or over the boundary of the field, scoring four or six runs
翻譯: 在板球中，將球擊至或越過場地邊界線，可得四分或六分。
小提醒：注意：'boundary' 與 'border' 常可互換指地理界線，但 'border' 更強調政治實體間的界線，而 'boundary' 的用法更廣泛，可指抽象或具體的各種界限。
發音（How to Pronounce "Boundary" in English）
How to pronounce "Boundary" in English?"Boundary" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Boundary" from YouTube Videos
Neil Burgess: How your brain tells you where you are
TED
“So the cell on the left, you can see it, fires whenever the animal gets near to a wall or a boundary to the east, whether it's the edge or the wall of a square box or the circular wall of the circular box, or even the drop at the edge of a table which the animals are running around.”
(1 out of 13)
Definitions（定義）
What are the definitions of "Boundary"?How does "Boundary" change by context?
2. a limit of what is acceptable or possible
可接受或可能範圍的界限
He pushed the boundaries of modern art with his innovative work.
他以創新的作品推動了現代藝術的界限。
It's important to set clear boundaries in a professional relationship.
在專業關係中設定明確的界線很重要。
3. a dividing line in a field of knowledge or activity
知識或活動領域中的分界線
The research explores the boundary between physics and philosophy.
這項研究探索了物理學與哲學之間的界線。
Her work blurs the boundary between documentary and fiction.
她的作品模糊了紀錄片與虛構故事之間的界線。
4. the limit of a subject or sphere of activity
主題或活動範圍的界限
This question falls outside the boundaries of our current discussion.
這個問題超出了我們當前討論的範圍。
The committee's authority has strict boundaries defined by the charter.
該委員會的權力有章程規定的嚴格範圍。
Grammar & Patterns（句型）
What are common sentence patterns for "Boundary"?How to make natural sentences with "Boundary"?
| Pattern | Meaning | Example |
|---|---|---|
| boundary + between + N | ...之間的界線 | The river forms a natural boundary between the two countries. (這條河是兩國之間的自然邊界。) |
| boundary + of + N | ...的邊界/範圍 | They were exploring the boundary of human knowledge. (他們正在探索人類知識的邊界。) |
| cross/transcend a boundary | 跨越/超越界線 | His remarks crossed a professional boundary. (他的言論跨越了專業界線。) |
| set/establish a boundary | 設定/建立界線 | It's important to set clear boundaries at work. (在工作中設定明確的界線很重要。) |
| push the boundaries of + N | 突破...的界限 | The artist pushes the boundaries of traditional painting. (這位藝術家突破了傳統繪畫的界限。) |
| within/beyond the boundary | 在界線內/外 | The village lies just beyond the city boundary. (這個村莊就位於城市邊界之外。) |
| blur the boundary | 模糊界線 | Technology is blurring the boundary between work and home life. (科技正在模糊工作與家庭生活的界線。) |
| national/territorial boundary | 國界/領土邊界 | The treaty defined the national boundary. (該條約劃定了國界。) |
用法說明
How is "Boundary" different from similar structures?What usage mistakes are common with "Boundary"?
boundary 與 borders / limits / frontiers 的區別
- boundary 通常指具體、明確、可定義的界線，如地圖上的線、財產的分界線，或抽象但清晰的規則限制。
- border 常指國家或政治實體之間的邊界，或物體的邊緣。
- limit 更側重於數量、程度或範圍上的最大或最小極限點。
- frontier 強調一個領域的邊緣地帶，常指未知或待開發的領域（如知識前沿、國土邊疆）。 EN: The river forms the natural boundary between the two counties. 翻譯: 這條河是這兩個郡之間的自然邊界。
EN:They crossed the border into another country at dawn.
翻譯:他們在黎明時分越過邊境進入另一個國家。
EN:We must respect the boundaries set by the community guidelines.
翻譯:我們必須尊重社群準則所設定的界線。
EN:There's a limit to how much stress a person can handle.
翻譯:一個人能承受的壓力是有限度的。
總結建議
當指具體、明確的劃分線或規則限制時，使用 boundary；指國界或邊緣用 border；指極限點用 limit；指前沿或邊疆地帶則用 frontier。
易混淆對比
What is the difference between "Boundary" and similar words?How to choose "Boundary" vs alternatives?
boundary vs border
「boundary」通常指抽象或概念上的界線，如領域、權限或心理界線；「border」則多指具體的地理或政治邊界，如國界或地圖上的邊線。
boundary vs limit
「boundary」指空間、領域或概念上的「邊界」，用以標示範圍的邊緣；「limit」則強調數量、程度或時間上的「極限」或「上限」。
boundary vs frontier
「boundary」是已確立、固定的界線；「frontier」則指一個領域的「前沿」或「邊疆」，常帶有探索、未知或待開發的意味。
口語用法
How is "Boundary" used in spoken English?What is the spoken vs formal difference for "Boundary"?
引述
在對話中，當引述或轉述他人設定的規則或限制時，常用 "boundary" 來表達。 EN: She made it clear from the start: "That's a boundary for me." 翻譯: 她一開始就說得很清楚：「那是我的底線。」
EN:He always says, "Respect my boundaries," but never explains what they are.
翻譯:他總是說：「尊重我的界線」，但從不解釋那是什麼。
語氣強調
在強調個人原則或不容妥協的立場時，會加重 "boundary" 的語氣。 EN: That is a hard boundary—do not cross it. 翻譯: 那是一條絕不可逾越的界線——別越界。
EN:I'm setting a firm boundary here: no work calls after 8 PM.
翻譯:我在這裡劃下一條明確的界線：晚上八點後不接工作電話。
停頓填充
在思考如何委婉表達限制或拒絕時，有時會用 "boundary" 作為填充詞，緩和語氣。 EN: It's not that I don't want to help, it's just... a personal boundary, you know? 翻譯: 不是我不想幫忙，只是…這是我個人的界線，你懂嗎？
EN:I think we need to talk about, uh, boundaries in our friendship.
翻譯:我想我們需要談談，呃，我們友誼中的界線。
正式寫作注意：在正式或學術寫作中（如論文、報告），應避免將 "boundary" 用於上述口語情境。請改用更精確的術語，如 "limit"、"constraint"、"demarcation" 或 "parameter"，並以完整句子清晰定義，而非用於引述或填充停頓。
常見短語
What common collocations use "Boundary"?What fixed phrases with "Boundary" should I remember?
boundary between
boundary between A and B
A與B之間的界線
cross/push the boundary
cross/push the boundary
跨越/突破界線
set/establish boundaries
set/establish boundaries
設定/建立界線
within/beyond the boundaries of
within/beyond the boundaries of something
在...的界線之內/之外
blur the boundaries
blur the boundaries
模糊界線
national boundary
national boundary
國界
boundary dispute
boundary dispute
邊界爭議
常見錯誤
What are common mistakes with "Boundary"?Which "Boundary" sentences look correct but are wrong?
×We need to set a clear bound for the project.
✓We need to set a clear boundary for the project.
「bound」作為名詞時，通常指「跳躍」或「界限」的抽象概念，較少用於指具體的界線或範圍。表示具體或比喻性的分界線、範圍或限制時，應使用「boundary」。
×He crossed the boundary of his neighbor's property.
✓He crossed the boundary onto his neighbor's property.
「cross the boundary of」語法上不完全正確。表示「越過…的界線進入某處」時，應使用「cross the boundary into/onto + 地點」。若強調「越過…的界線」這個動作本身，可使用「cross the boundary of」但較不自然，通常會用更明確的介系詞。
×There is no clear boundary among work and personal life.
✓There is no clear boundary between work and personal life.
「boundary」用於標示兩者（或兩群明確事物）之間的分隔時，固定搭配介系詞「between」。「among」用於三者或以上，且不強調明確的一對一劃分，因此不適用於「boundary」的典型用法。
×This new theory pushes the boundary of physics.
✓This new theory pushes the boundaries of physics.
在「push the boundaries」（突破界限、開拓新領域）這個常見片語中，習慣使用複數形式「boundaries」，意指多方面的限制或已知範圍的邊緣。使用單數「boundary」在此語境下不自然。
×We should respect each other's privacy boundary.
✓We should respect each other's privacy boundaries.
「隱私界線」通常涉及多個方面或情境（如時間、空間、話題、情感），因此習慣上使用複數形式「privacy boundaries」。使用單數聽起來不自然，且可能暗示只有一條單一的界線。
詞形變化
What are the word forms of "Boundary"?What are tense/participle forms of "Boundary"?