1. happening repeatedly or all the time
持續不斷的，經常發生的
The constant noise from the construction site made it hard to concentrate.
建築工地持續不斷的噪音讓人難以集中精神。
She was under constant pressure to meet the deadlines.
她一直承受著必須在期限內完成的壓力。
Constant Meaning（定義、用法、例句與發音）
constant
adjective
快速理解
What does "Constant" mean?What are 2-3 core uses of "Constant"?
形容持續不變、反覆發生或忠誠不移的狀態。
- 1
持續不變的
EN: happening all the time or repeatedly
翻譯: 持續發生的；反覆出現的
- 2
穩定的
EN: staying the same, not changing
翻譯: 保持不變的；穩定的
- 3
忠誠的
EN: faithful and loyal
翻譯: 忠誠的；堅定不移的
小提醒：注意 'constant' 與 'continuous' 的細微差別：'constant' 強調頻繁重複或穩定不變，'continuous' 則強調無間斷的延續。
發音（How to Pronounce "Constant" in English）
How to pronounce "Constant" in English?"Constant" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Constant" from YouTube Videos
How Pitching Investors is Different Than Pitching Customers - Michael Seibel
Y Combinator
“only after kind of constant trying do we convince them it's better just to have two separate pitches.”
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Definitions（定義）
What are the definitions of "Constant"?How does "Constant" change by context?
2. staying the same and not changing
不變的，恆定的
The temperature in the laboratory must be kept constant for the experiment.
實驗室的溫度必須保持恆定，以確保實驗順利進行。
His love for her remained constant throughout the years.
多年來，他對她的愛始終不變。
3. faithful and dependable
忠實的，可靠的
He has been a constant friend to me through all my difficulties.
在我經歷所有困難時，他一直是我忠實的朋友。
Her constant support was crucial to the success of the project.
她可靠的支持對這個專案的成功至關重要。
Grammar & Patterns（句型）
What are common sentence patterns for "Constant"?How to make natural sentences with "Constant"?
| Pattern | Meaning | Example |
|---|---|---|
| constant + noun | 持續的… | The constant noise made it hard to concentrate. (持續的噪音讓人難以專心。) |
| remain + constant | 保持不變 | The temperature remained constant throughout the experiment. (實驗過程中溫度保持不變。) |
| be + constant | 是恆定的/不變的 | His support for the team has been constant. (他對團隊的支持始終如一。) |
| a constant stream/flow of + noun | 源源不斷的… | There was a constant stream of visitors to the exhibition. (展覽會場有源源不斷的訪客。) |
| in constant + noun | 處於持續的…狀態 | The machine is in constant use. (這台機器處於持續使用的狀態。) |
用法說明
How is "Constant" different from similar structures?What usage mistakes are common with "Constant"?
constant doing vs constant to do
- "constant doing" 通常描述一個持續不斷、反覆發生的狀態或行為，強調其連續性。
- "constant to do" 的結構在標準英語中並不常見，因為 "constant" 是形容詞，通常不直接接 "to do" 不定詞。
- 若要表達「持續不斷地做某事」的動作，更常見的結構是 "constantly doing" 或 "be constant in doing"。
- 在正式或文學語境中，偶爾可見 "constant to + 動詞原形" 表示「忠於做某事」或「堅持做某事」，但這並非主流用法。 EN: The constant dripping of the faucet kept me awake all night. 翻譯: 水龍頭持續不斷的滴水聲讓我整晚無法入睡。
EN:He was constant in his efforts to improve the community.
翻譯:他堅持不懈地努力改善社區。
總結建議
建議使用 "constant + 名詞" 或 "constantly doing" 來表達持續的狀態或動作，避免使用 "constant to do" 這種非標準結構。
易混淆對比
What is the difference between "Constant" and similar words?How to choose "Constant" vs alternatives?
constant vs continual
「constant」強調穩定不變、持續存在；「continual」則指反覆發生，中間可能有間斷。
constant vs steady
「constant」強調絕對不變；「steady」強調穩定、規律，但可能允許小幅波動。
constant vs consistent
「constant」指持續不變；「consistent」強調在不同時間或情境下保持一致的模式或標準。
口語用法
How is "Constant" used in spoken English?What is the spoken vs formal difference for "Constant"?
引述
在對話中，用來引述或重複一個被認為是持續不變的事實或狀態。 EN: He's constant in his support, always there when you need him. 翻譯: 他的支持是始終如一的，總是在你需要的時候出現。
EN:The noise from the construction site is just constant.
翻譯:工地傳來的噪音簡直是沒停過。
語氣強調
用來強調某種情況的持續性，帶有輕微的抱怨或誇張語氣。 EN: I'm under constant pressure to meet these deadlines. 翻譯: 我承受著無時無刻的壓力來趕這些截止日期。
EN:Her constant questions are driving me crazy!
翻譯:她一直問問題，快把我逼瘋了！
停頓填充
在組織思緒時，用來填充停頓，引出一個眾所周知或持續存在的背景情況。 EN: It's a constant struggle, you know, trying to balance work and life. 翻譯: 這是一場持續不斷的奮鬥，你知道的，就是試圖平衡工作與生活。
EN:The constant changes in policy make it hard to plan ahead.
翻譯:政策不斷改變，讓人很難預先規劃。
注意：在正式寫作中（如學術報告、商業文件），應避免將 "constant" 用於上述口語的誇張或填充停頓的用法，而應精確描述頻率或狀態（如 "continuous", "perpetual", "unceasing"），以保持語言的嚴謹性。
常見短語
What common collocations use "Constant"?What fixed phrases with "Constant" should I remember?
constant pressure
constant + noun
持續的壓力
constant reminder
constant + noun
不斷的提醒
constant companion
constant + noun
形影不離的伴侶
constant threat
constant + noun
持續的威脅
constant change
constant + noun
持續的變化
a constant source of
a constant source of + noun
一個持續的...來源
remain constant
verb + constant
保持不變
hold constant
verb + constant
保持恆定
常見錯誤
What are common mistakes with "Constant"?Which "Constant" sentences look correct but are wrong?
×He is a constant person.
✓He is a consistent person.
在形容人的性格或行為時，'constant' 通常不用來指人本身，而是指其行為或狀態。若要表達一個人「始終如一、可靠」，應使用 'consistent'。'Constant' 更常用於描述持續發生或存在的狀態、壓力、噪音等。
×The temperature is constant at 25 degrees.
✓The temperature is constant at 25 degrees Celsius.
在科學或正式語境中，描述一個恆定數值時，必須包含單位（如 Celsius, percent, kPa 等），否則語意不完整。口語中可能省略，但在書寫或精確表達時應保留單位。
×She is constant complaining about the noise.
✓She is constantly complaining about the noise.
'Constant' 是形容詞，不能直接修飾動詞。修飾動詞（如 complaining）應使用副詞 'constantly'。這是詞性誤用的常見錯誤。
×We need a constant of this variable in the equation.
✓We need a constant for this variable in the equation.
在數學或程式語境中，表示「某變數的常數」時，介系詞應使用 'for'，而非 'of'。'Constant of' 通常用於特定名詞片語，如 'constant of proportionality'（比例常數）。
×His constant absence made the team weak.
✓His frequent/continuous absence made the team weak.
雖然 'constant absence' 文法正確，但邏輯上 'absence'（缺席）無法真正「持續不斷」，因為人不在就是不在。更地道的說法是 'frequent absence'（頻繁缺席）或 'continuous absence'（連續缺席一段時間）。'Constant' 更適合與持續的狀態或動作連用，如 constant pain, constant noise。
詞形變化
What are the word forms of "Constant"?What are tense/participle forms of "Constant"?