fluid
fluid — 名詞
1. any material that can move and pour freely, changing to fit the container it is
流體
能流動的非固態物質
any material that can move and pour freely, changing to fit the container it is placed in — water and air are both examples
The nurse removed the fluid from Daichi's knee with a long needle.
護士用一根長針從 Daichi 的膝蓋抽出體液。
countable noun: fluid from a body part (medical context)
Your car needs fresh brake fluid every two years to stay safe.
你的汽車每兩年需要更換一次煞車油才能保持安全。
technical compound noun: brake fluid, coolant fluid
During science class, Roya learned that air is a fluid, just like water.
Roya 在自然課學到，空氣和水的本質一樣，都是一種流體。
Rin poured the blue fluid from the beaker into a thin measuring tube for testing.
Rin 把燒杯裡的藍色液體倒入一支細量管進行檢測。
The hot fluid from the engine flowed through a metal pipe into the cooling tank.
引擎的高溫液體經由金屬管流入冷卻槽。
- solid
a substance with a fixed shape that does not flow
文法句型
fluid + verb (flows, leaks, evaporates)
a/the + fluid + of + noun
用法筆記
The noun can be countable (three different fluids were tested) or uncountable (brake fluid needs replacing). In everyday speech, 'liquid' is more common; 'fluid' carries a more technical or medical feel.
常見錯誤
fluid — 形容詞
1. moving or happening in a smooth, graceful way that has no sudden stops, breaks,
流暢的
動作或風格平順不間斷的
moving or happening in a smooth, graceful way that has no sudden stops, breaks, or awkward moments
The dancer's fluid movements made the whole performance look effortless.
舞者流暢的動作讓整場表演看起來毫不費力。
fluid movement (collocation: graceful, continuous motion)
Heloísa speaks French with such a fluid style that listeners assume she is native.
Heloísa 的法語說得如此流暢，聽眾都以為她是母語人士。
fluid style (collocation: smooth speech or writing)
Tyler's fluid dive into the pool earned him the highest score from the judges.
Tyler 流暢地跳入泳池，為他贏得了裁判的最高分。
Isabela's sentences moved in a fluid stream that carried the reader smoothly through the story.
Isabela 的文字像一股流暢的溪流，帶著讀者平順地讀完故事。
Astrid repeated the same dance step until her movements looked fluid and natural.
Astrid 重複練習同一個舞步，直到她的動作看起來流暢而自然。
- smooth
more general; can describe textures and surfaces, not just motion
- graceful
emphasizes elegance and beauty in movement rather than just continuity
- flowing
very close in meaning; often used for hair, fabric, or water as well
- effortless
focuses on the ease of the movement, not just its continuity
文法句型
fluid + noun (movement, motion, style, writing)
be + fluid (Her dance was fluid.)
用法筆記
Common in descriptions of dance, sports, and artistic performance; also applied to writing and speech. The opposite is 'jerky' or 'stiff'.
常見錯誤
2. not yet set or settled, shifting repeatedly and often doing so without clear war
未定；易變
容易變化且尚無最終形式的
not yet set or settled, shifting repeatedly and often doing so without clear warning
The peace talks between Ishaan's country and its neighbour remained fluid, with no fixed agreement yet.
Ishaan 的國家與鄰國之間的和平談判仍然未定，尚未達成任何協議。
remain fluid (collocation: situations that keep shifting)
Christopher said his travel plans are still fluid — he might visit Japan or Brazil.
Christopher 說他的旅行計畫還沒有確定——他可能會去日本或巴西。
fluid plans (collocation)
The manager at Naoko's company kept the team schedule fluid so they could shift tasks as needed.
Naoko 公司的主管讓團隊時程保持彈性，以便視需要調整工作內容。
Talia kept the classroom schedule fluid so she could adapt it to her students' needs.
Talia 讓課表保持彈性，以便根據學生的需求進行調整。
Tamar's career path has been fluid — she moved from teaching into graphic design, then into marketing.
Tamar 的職涯歷經多次變動——她從教書轉到平面設計，再轉到行銷領域。
文法句型
be + fluid (The situation is fluid.)
fluid + noun (fluid plans, a fluid boundary)
用法筆記
Predicative use (the situation is fluid) is most frequent. Attributive use (a fluid boundary) also occurs. This sense carries a neutral or slightly cautious tone — it does not mean 'unreliable', only that change is expected.
常見錯誤
3. having a physical nature that allows it to flow easily and change shape, like wa
流質的
像液體一樣容易流動的
having a physical nature that allows it to flow easily and change shape, like water or oil rather than like stone or wood
Liam watched the warm maple syrup flow in a fluid stream over his breakfast pancakes.
Liam 看著溫熱的楓糖漿以流質的狀態流到他的早餐鬆餅上。
fluid stream (physical property: pours easily when warm)
The lava from the volcano was so fluid that it raced down the hillside quickly.
火山流出的熔岩非常流質，迅速地沿著山坡沖下。
At high temperatures glass becomes fluid and can be shaped into new forms.
在高溫下，玻璃會變成流質，可以被塑造成新的形狀。
Cooking oil is more fluid than honey, so it spreads across a pan much faster.
食用油比蜂蜜更稀，因此在平底鍋上擴散的速度快得多。
文法句型
fluid + noun (substance, material)
be + fluid (Lava is fluid.)
more fluid than + noun
用法筆記
Distinguish from the noun sense: as an adjective, fluid describes the property of being able to flow, not the substance itself. Used primarily in scientific writing or when comparing the flow properties of different materials.