1. a hole or hollow space in a solid object or in the body
物體或身體內的洞或空腔
The dentist found a small cavity in my molar.
牙醫在我的臼齒發現一個小蛀洞。
Birds often nest in cavities in trees.
鳥類常在樹洞裡築巢。
Cavity Meaning（定義、用法、例句與發音）
cavity
noun
快速理解
What does "Cavity" mean?What are 2-3 core uses of "Cavity"?
指物體或身體內部的中空或凹陷處。
- 1
身體空腔
EN: a hollow space within the body
翻譯: 身體內部的空腔，如胸腔、腹腔。
- 2
牙齒蛀洞
EN: a hole in a tooth caused by decay
翻譯: 因蛀牙而在牙齒上形成的洞。
- 3
物體凹洞
EN: a hollow or hole in a solid object
翻譯: 固體物體上的凹陷或孔洞。
- 4
地質洞穴
EN: a natural underground chamber
翻譯: 自然形成的地下洞穴或空間。
小提醒：在醫學或牙科領域，'cavity' 通常特指需要治療的異常空洞（如蛀牙），而非泛指所有空腔。
發音（How to Pronounce "Cavity" in English）
How to pronounce "Cavity" in English?"Cavity" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Cavity" from YouTube Videos
Metal that breathes | Doris Kim Sung
TED
“I'm also looking at trying to develop some building components for the market, and so here you see a pretty typical double-glazed window panel, and in that panel, between those two pieces of glass, that double-glazing, I'm trying to work on making a thermo-bimetal pattern system so that when the sun hits that outside layer and heats that interior cavity, that thermo-bimetal will begin to curl, and what actually will happen then is it'll start to block out the sun in certain areas of the building, and totally if necessary.”
(1 out of 1)
Definitions（定義）
What are the definitions of "Cavity"?How does "Cavity" change by context?
2. a decayed area in a tooth
牙齒上的蛀洞
If you don't brush regularly, you might develop cavities.
如果你不規律刷牙，可能會產生蛀牙。
The cavity was filled with a silver amalgam.
蛀洞用銀汞合金填補了。
3. an empty space within the body, especially one containing organs
身體內的空腔（尤指容納器官的）
The abdominal cavity contains the stomach and intestines.
腹腔內有胃和腸。
The thoracic cavity is protected by the rib cage.
胸腔由肋骨保護。
4. a hollow space in a structure or material
結構或材料中的空洞
The builders insulated the wall cavity to improve energy efficiency.
建築工人為牆體空腔加裝隔熱材料以提高能源效率。
A cavity in the rock provided shelter from the rain.
岩石中的一個空洞提供了避雨之處。
Grammar & Patterns（句型）
What are common sentence patterns for "Cavity"?How to make natural sentences with "Cavity"?
| Pattern | Meaning | Example |
|---|---|---|
| cavity + in + [body part] | 在（身體部位）上的空洞或蛀洞 | The dentist found a cavity in my molar. (牙醫在我的臼齒上發現了一個蛀洞。) |
| cavity + of + [something hollow] | （中空物體的）腔室 | The nasal cavity helps to filter and humidify the air we breathe. (鼻腔有助於過濾和濕潤我們呼吸的空氣。) |
| [adjective] + cavity | 形容空洞的狀態 | The old tree had a large, hollow cavity in its trunk. (那棵老樹的樹幹上有一個巨大的空洞。) |
| fill/repair a cavity | 填補/修復蛀洞 | I need to go to the dentist to fill this cavity. (我需要去看牙醫來填補這個蛀洞。) |
| develop/form a cavity | 形成蛀洞 | If you don't brush regularly, you might develop a cavity. (如果你不規律刷牙，可能會形成蛀洞。) |
用法說明
How is "Cavity" different from similar structures?What usage mistakes are common with "Cavity"?
cavity vs. cavities
- Cavity (單數) 通常指一個具體的、特定的空洞或蛀洞。
- Cavities (複數) 則泛指多個空洞，或在醫學上（尤其是牙科）指普遍存在的蛀牙問題。
- 在描述身體或物體結構時，單數形式強調單一空間，複數形式則描述多個此類空間的集合。
對比範例： EN: The dentist found a cavity in my molar. 翻譯: 牙醫在我的臼齒發現了一個蛀洞。
EN:Regular brushing helps prevent cavities.
翻譯:定期刷牙有助於預防蛀牙。
總結建議
在描述具體單一蛀洞時使用 "cavity"，而在泛指蛀牙問題或多個空洞時使用 "cavities"。
易混淆對比
What is the difference between "Cavity" and similar words?How to choose "Cavity" vs alternatives?
cavity vs hole
「cavity」通常指物體內部或表面自然形成或被侵蝕出的凹洞或空腔，常見於醫學（蛀牙）或地質學。而「hole」泛指任何穿透或未穿透的洞，範圍更廣，用法更普遍。
cavity vs cavern
「cavity」指較小的空腔或凹洞，而「cavern」特指巨大的地下洞穴或洞窟，通常為自然形成且空間寬闊。
cavity vs hollow
「cavity」是名詞，指具體存在的洞或空腔。而「hollow」可作形容詞描述「中空的」狀態，或作名詞指表面凹陷處或小山谷。
口語用法
How is "Cavity" used in spoken English?What is the spoken vs formal difference for "Cavity"?
引述
在對話中，當引述或轉述他人（如醫生、牙醫）的診斷或發現時，常用此字。 EN: My dentist said, "You have a small cavity that needs a filling." 翻譯: 我的牙醫說：「你有一個小蛀牙需要補。」
EN:She told me, "The X-ray shows a cavity in your back tooth."
翻譯:她告訴我：「X光片顯示你的後臼齒有個蛀洞。」
語氣強調
在非正式對話中，會加入一些詞彙來強調問題的嚴重性或表達個人感受。 EN: Ugh, I have a huge cavity, and my appointment isn't until next week! 翻譯: 唉，我有一個超大的蛀洞，但我的預約要等到下星期！
EN:That's not just a stain; it's an actual cavity forming.
翻譯:那不只是污漬，是真正在形成的蛀牙。
停頓填充
在描述或思考時，會用此字作為停頓點，或與其他詞語組合，使對話更自然。 EN: So, the issue is... a cavity... in one of my molars. 翻譯: 所以，問題是…一個蛀洞…在我的一顆臼齒裡。
EN:I think I might have a — you know — a cavity starting.
翻譯:我覺得我可能有一顆 — 你知道的 — 開始形成的蛀牙。
正式寫作注意：在正式或學術寫作（如醫學報告、研究論文）中，應使用更精確的術語，例如「dental caries」、「carious lesion」或「tooth decay」，而非口語化的 "cavity"。
常見短語
What common collocations use "Cavity"?What fixed phrases with "Cavity" should I remember?
dental cavity
noun + cavity
蛀牙；齲齒
nasal cavity
noun + cavity
鼻腔
chest cavity
noun + cavity
胸腔
fill a cavity
verb + cavity
補牙
body cavity
noun + cavity
體腔
cavity wall
cavity + noun
空心牆；夾層牆
oral cavity
noun + cavity
口腔
常見錯誤
What are common mistakes with "Cavity"?Which "Cavity" sentences look correct but are wrong?
×I have a cavity on my tooth.
✓I have a cavity in my tooth.
在英文中，蛀牙（cavity）是存在於牙齒「內部」的洞，因此介系詞應使用「in」，而非表示在表面上的「on」。
×I need to fill my cavity.
✓I need to get my cavity filled. / The dentist needs to fill my cavity.
「fill my cavity」在語法上不完整，因為主詞通常是牙醫或診所進行填補的動作。更自然的說法是使用被動語態「get my cavity filled」或明確指出動作執行者。
×I have a hole in my tooth.
✓I have a cavity.
雖然「hole in my tooth」在口語中可能被理解，但在醫療或正式情境中，描述牙齒蛀蝕的正確術語是「cavity」。使用「cavity」更為精確且專業。
×I have three cavities.
✓I have three cavities. (Correct, but note pronunciation: /ˈkæv.ə.tiz/)
此錯誤在於發音。許多學習者會將複數形式「cavities」誤讀為「cavity」加上「s」的清晰音。正確發音是「cavities」中的「ties」發音類似「tease」。
×The cavity in the wall is used for storage.
✓The niche / recess / hollow in the wall is used for storage.
「Cavity」在非醫學上下文中，通常指物體內部的空洞（如口腔、洞穴），但用於描述牆壁上的凹處並不常見且不精確。更合適的詞是「niche」、「recess」或「hollow」。
詞形變化
What are the word forms of "Cavity"?What are tense/participle forms of "Cavity"?