1. the large area of salt water that covers most of the Earth's surface
覆蓋地球表面大部分區域的廣大鹹水體
We went swimming in the sea.
我們去海裡游泳了。
The ship sailed across the sea.
那艘船航行穿過了大海。
I love the smell of the sea.
我喜歡大海的氣味。
Sea Meaning（定義、用法、例句與發音）
sea
noun
快速理解
What does "Sea" mean?What are 2-3 core uses of "Sea"?
指廣闊的鹹水體，也常用於比喻大量或廣闊的事物。
- 1
海洋
EN: the large area of salt water that covers much of the Earth's surface
翻譯: 覆蓋地球表面大部分區域的廣闊鹹水體。
- 2
大量；廣闊
EN: a vast or overwhelming quantity or expanse of something
翻譯: 指某事物極其大量或廣闊的一片。
- 3
特定海域
EN: a particular part of an ocean, often with a specific name
翻譯: 指海洋中具有特定名稱的區域。
小提醒：注意 'sea' 和 'ocean' 常可互換，但 'ocean' 通常指更大的主體（如太平洋），而 'sea' 可指較小的部分或特定海域（如地中海）。
發音（How to Pronounce "Sea" in English）
How to pronounce "Sea" in English?"Sea" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Sea" from YouTube Videos
Diane Greene's Advice for Founders
Y Combinator
“I suddenly, you know, was the Mistress of my world, in in charge of a boat and on my own, you know, facing overcoming the challenges, uh, that the sea would present to me, and later on I would race bigger boats and wind Surfers.”
(1 out of 83)
Definitions（定義）
What are the definitions of "Sea"?How does "Sea" change by context?
2. a particular area of the sea, often with a specific name
海洋的特定區域，通常有專屬名稱
The North Sea can be very rough in winter.
北海在冬天可能非常洶湧。
They are studying the marine life in the Caribbean Sea.
他們正在研究加勒比海的海洋生物。
3. a vast or overwhelming quantity of something
大量或浩瀚無邊的某事物
She looked out at a sea of faces in the crowd.
她望向人群中一片人山人海。
The field was a sea of yellow flowers.
那片田野是一片黃色花海。
4. the movement or state of the ocean's surface
海面的運動或狀態
The sea was calm this morning.
今天早上海面很平靜。
Heavy seas forced the small boat to turn back.
洶湧的海浪迫使小船返航。
Grammar & Patterns（句型）
What are common sentence patterns for "Sea"?How to make natural sentences with "Sea"?
| Pattern | Meaning | Example |
|---|---|---|
| at sea | 在海上；困惑 | The ship has been at sea for three months. (那艘船已在海上航行了三個月。) |
| by sea | 經由海路 | They transported the goods by sea. (他們經由海路運輸貨物。) |
| go to sea | 出海；當水手 | He decided to go to sea as a young man. (他年輕時決定出海當水手。) |
| a sea of something | 大量的某物 | She looked out at a sea of faces in the crowd. (她望向人群中無數張面孔。) |
| put (out) to sea | 出海，啟航 | The fishing boats put to sea at dawn. (漁船在黎明時分出航了。) |
用法說明
How is "Sea" different from similar structures?What usage mistakes are common with "Sea"?
sea 與 the sea 的用法
- sea（不加冠詞）通常用於泛指「海洋」這個概念，或用在固定片語中，例如
by sea（經由海路）、at sea（在海上航行）。 - the sea（加定冠詞）則特指我們所談論的、眼前看到的或特定的一片海洋。
- 在許多情況下，兩者可以互換，但 the sea 更為常見，尤其是在指涉具體的海洋環境時。
對比範例： EN: He works at sea for months at a time. 翻譯: 他一次就在海上工作好幾個月。
EN:The children love playing in the sea when we go to the beach.
翻譯:我們去海灘時，孩子們很喜歡在海裡玩耍。
對比範例： EN: Pollution is a major threat to the sea. 翻譯: 污染是對海洋的一大威脅。
EN:They traveled by sea to reach the island.
翻譯:他們經由海路前往那座島嶼。
總結建議
一般情況下，談論具體的海洋時使用 the sea，而在固定搭配或泛指概念時則使用 sea。
易混淆對比
What is the difference between "Sea" and similar words?How to choose "Sea" vs alternatives?
sea vs ocean
「sea」通常指較小的鹹水體，或大洋的一部分，常被陸地部分包圍；「ocean」則指廣闊無垠的主要鹹水體，如太平洋、大西洋。
sea vs lake
「sea」是鹹水體，與大洋相連；「lake」是淡水體，被陸地完全包圍。
sea vs coast
「sea」指的是水域本身；「coast」指的是陸地與海相接的邊緣地帶。
口語用法
How is "Sea" used in spoken English?What is the spoken vs formal difference for "Sea"?
引述
在對話中，用來引述或提及一個廣為人知的概念、成語或固定說法。 EN: When I say "sea of troubles," I'm quoting Shakespeare. 翻譯: 當我說「sea of troubles」時，我是在引用莎士比亞。
EN:He described the crowd as a "sea of faces."
翻譯:他把人群形容為「sea of faces」。
語氣強調
用於誇張或強調數量極多、範圍極廣，以加強語氣。 EN: I have a sea of paperwork to finish by Friday. 翻譯: 我有一大堆文書工作要在星期五前完成。
EN:After the announcement, there was a sea of questions from the audience.
翻譯:公告發布後，觀眾提出了如潮水般的問題。
停頓填充
在思考或組織語句時，作為短暫的停頓填充詞，常與其他詞彙連用。 EN: The options are... sea... well, endless, really. 翻譯: 選擇是… 多如海… 嗯，真的數不盡。
EN:It felt like a whole sea of... you know, possibilities opened up.
翻譯:感覺就像一整片… 你知道的，可能性之海打開了。
正式寫作注意：在學術或正式商業寫作中，應避免將 "sea" 用於上述口語的誇張或填充停頓用法，以保持文體的嚴謹與精確。建議使用更具體的詞彙，如 "a large number of", "an extensive range of", 或 "a multitude of"。
常見短語
What common collocations use "Sea"?What fixed phrases with "Sea" should I remember?
at sea
prepositional phrase
在海上；感到困惑
by sea
prepositional phrase
經由海路
sea level
noun phrase
海平面
the open sea
noun phrase
外海，公海
sea of
noun + of + noun
大量的，一片（用於比喻）
across the sea
prepositional phrase
在海外，跨海
calm sea
adjective + noun
平靜的海面
sea change
noun phrase
巨大的轉變，劇變
常見錯誤
What are common mistakes with "Sea"?Which "Sea" sentences look correct but are wrong?
×We sailed across the ocean to reach the island.
✓We sailed across the sea to reach the island.
Learners often confuse 'sea' and 'ocean'. Use 'sea' for smaller, partially enclosed bodies of salt water, or specific named seas (e.g., the Mediterranean Sea). Use 'ocean' for the vast global bodies (Pacific, Atlantic, etc.). For reaching a nearby island, 'sea' is more natural.
×I love swimming in sea.
✓I love swimming in the sea.
When referring to the sea in a general sense (as a concept or body of water), the definite article 'the' is almost always required. Omitting it is a common error.
×From the hill, you can sea for miles.
✓From the hill, you can see for miles.
This is a homophone error. 'Sea' (noun) refers to the body of water. 'See' (verb) means to perceive with the eyes. They sound the same but have different meanings and spellings.
×The fishermen spent months on the sea.
✓The fishermen spent months at sea.
The fixed phrase 'at sea' means on a voyage or working on the ocean. 'On the sea' is less common and usually describes something physically located on its surface (e.g., 'a boat on the sea'). For describing the state of being on a voyage, 'at sea' is the correct idiom.
×The storm created very big seas.
✓The storm created very big waves. / The storm created a very rough sea.
'Sea' as a body of water is usually uncountable. The plural 'seas' is used in literary/formal contexts to mean 'the oceans of the world' or specific named seas. For individual swells of water, the word is 'waves'. You can use 'a rough/heavy/calm sea' to describe its state.
詞形變化
What are the word forms of "Sea"?What are tense/participle forms of "Sea"?