gases

IPA/ɡæs/
KK[ɡˈæsəz]IPA/ɡæs/

gases — 名詞

  • gasessingular
  • gasesesplural

1. a substance that has no fixed shape or volume and naturally spreads out to fill

1.名詞A2
釋義

氣體

無固定形狀、可擴散的物質

a substance that has no fixed shape or volume and naturally spreads out to fill any container it is placed in — oxygen, carbon dioxide, and nitrogen are examples of gases that make up the air we breathe

例句

Carbon dioxide is a gas that plants use during photosynthesis.

二氧化碳是一種植物進行光合作用所需的氣體。

uncountable, naming a specific gas

The factory released several harmful gases into the atmosphere.

這家工廠將幾種有害氣體排放到大氣中。

plural: different types of gas

同義詞
  • vapor

    usually refers to a substance that is liquid or solid at room temperature but has become gaseous; more specific than 'gas'

  • fume

    a gas or vapor that smells strongly or is harmful; always plural in this sense

反義詞
  • solid

    matter with a fixed shape and volume

  • liquid

    matter that flows but has a fixed volume

用法筆記

Countable when referring to specific chemical types (e.g. 'greenhouse gases'), uncountable as a general state of matter ('Gas has no fixed volume').

常見錯誤

❌A gas is one of the state of matters.
✅A gas is one of the states of matter.
💡'state of matter' is the correct fixed phrase.
❌The air is a mixture of gas.
✅The air is a mixture of gases.
💡use the plural when naming different types.

2. a type of fuel that comes from the ground and is burned to produce heat for cook

2.名詞A2
釋義

瓦斯；天然氣

用於烹飪和取暖的燃料

a type of fuel that comes from the ground and is burned to produce heat for cooking, heating buildings, or powering equipment

例句

Mizuki turned on the gas and put the kettle on for tea.

Mizuki 打開瓦斯爐，把水壺放上去泡茶。

uncountable: fuel for cooking

Their apartment building uses gas for heating and hot water.

他們的公寓大樓使用瓦斯來供暖和提供熱水。

gas for heating

同義詞
  • natural gas

    the full name for the fuel extracted from the ground

用法筆記

Commonly modified by 'natural' to distinguish from other fuel types. 'Gas' without a modifier usually refers to natural gas in British English contexts.

常見錯誤

❌I cook with a gas.
✅I cook with gas.
💡'gas' as a fuel is uncountable.

3. a substance in the form of a vapor that is breathed in through a mask to make a

3.名詞B2
釋義

麻醉氣體

手術中用來麻醉患者的氣體

a substance in the form of a vapor that is breathed in through a mask to make a patient unconscious or unable to feel pain during a medical operation

例句

The anesthetist gave the patient gas through a mask before the surgery began.

麻醉師在手術前透過面罩給患者吸入氣體。

medical context: gas + mask

Jiwoo felt dizzy as the gas took effect, then remembered nothing until she woke up.

Jiwoo 在麻醉氣體發揮作用時感到頭暈，之後直到醒來都不記得發生什麼事。

同義詞
  • anesthetic

    the general term for any drug that prevents pain during surgery; 'gas' is a specific type

用法筆記

In informal conversation, 'gas' can refer to nitrous oxide ('laughing gas') used at the dentist. In medical writing, specific names like 'sevoflurane' or 'nitrous oxide' are preferred.

4. air or other gases that build up in the stomach or intestines, often causing dis

4.名詞B1
釋義

腸氣；胃氣

消化系統中產生的氣體

air or other gases that build up in the stomach or intestines, often causing discomfort, bloating, or the need to release it from the body

例句

Eating beans can give you gas, but soaking them overnight helps reduce it.

吃豆子會讓你脹氣，但浸泡一整晚有助於減少這個問題。

collocation: give someone gas

The baby had gas after feeding and cried until Heather gently patted her back.

寶寶喝奶後肚子脹氣，希瑟 輕輕拍她的背安撫。

baby gas: common context

同義詞
  • wind

    the common British English term for gas in the digestive system

  • bloating

    the uncomfortable feeling of having too much gas in the stomach, not the gas itself

用法筆記

Considered a sensitive topic in some social contexts. In polite conversation, 'wind' (British) or 'gas' (American) is used instead of more graphic terms.

常見錯誤

❌I have a gas in my stomach.
✅I have gas in my stomach.
💡'gas' in this sense is uncountable.
❌The baby has gases.
✅The baby has gas.
💡uncountable even when referring to a lot of it.

5. a liquid fuel refined from crude oil that powers the engines of cars, trucks, an

5.名詞A2
釋義

汽油

車輛使用的液態燃料

a liquid fuel refined from crude oil that powers the engines of cars, trucks, and other road vehicles — short for 'gasoline'

例句

Eli stopped at the station to put gas in the car before the long drive.

Eli 在長途開車前停在加油站加油。

collocation: put gas in the car

The price of gas went up by twenty cents per liter this week.

本週汽油價格每公升漲了兩角。

collocation: price of gas

同義詞
  • gasoline

    the full, more formal name for the fuel; 'gas' is the shortened everyday form

  • petrol

    the British English equivalent

用法筆記

This sense is almost exclusively American English. In British English, the fuel is called 'petrol'. The word 'gas' in the UK means the cooking/heating fuel (sense 2).

常見錯誤

❌I need to fill gas.
✅I need to fill up with gas' or 'I need to get gas.
💡'fill' requires a particle or different verb pattern.
❌I put petrol in my car' (in an American context).
✅Use 'gas' in the US; 'petrol' in the UK.

6. the pedal in a car or truck that you push down to increase the vehicle's speed —

6.名詞B1
釋義

油門

汽車的加速踏板

the pedal in a car or truck that you push down to increase the vehicle's speed — short for 'gas pedal'

例句

Inês pressed the gas gently as she merged onto the freeway.

Inês 輕輕踩下油門，匯入高速公路車流。

collocation: press the gas

The instructor told the student to take his foot off the gas when approaching the red light.

教練告訴學員看到紅燈時要把腳從油門上移開。

collocation: foot off the gas

同義詞
  • accelerator

    the formal term for the pedal; used in all varieties of English

  • throttle

    technical term for the valve that controls fuel flow, also used to mean the accelerator in some contexts

反義詞
  • brake

    the pedal that slows or stops the vehicle

用法筆記

Always used with 'the' ('the gas'). In British English, this is called 'the accelerator' or 'the throttle'. 'Step on the gas' also has a figurative meaning meaning 'hurry up'.

常見錯誤

❌Push the gas pedal to stop the car.
✅Push the brake to stop the car.
💡the gas makes the car go; the brake stops it.

7. an experience or activity that is very enjoyable, amusing, or exciting — used in

7.名詞C1
釋義

好玩；開心

令人愉快的經驗或活動

an experience or activity that is very enjoyable, amusing, or exciting — used in informal expressions like 'a gas' or 'good gas'

例句

The street festival with live music and food stalls was a real gas.

那個有現場音樂和美食攤位的街頭嘉年華真的很好玩。

phrase: a real gas

Esme said the comedy show was a gas and that we should all go next time.

Esme 說那場喜劇秀非常有趣，叫我們下次一定要去。

同義詞
  • fun

    the standard, neutral word for enjoyment; 'a gas' is more informal and slightly dated

  • a blast

    a common modern slang equivalent that still sounds current

反義詞
  • a drag

    slang for something boring or unpleasant

用法筆記

This slang sense peaked in mid-20th-century American English and sounds dated to younger speakers. It is still understood but not commonly used in everyday conversation today.

常見錯誤

❌The party was gas.
✅The party was a gas.
💡'a' is required before 'gas' in this slang sense.

8. in baseball, the quality of throwing a ball at very high speed, especially from

8.名詞C1
釋義

快速球

棒球投手投出的高速球

in baseball, the quality of throwing a ball at very high speed, especially from the pitcher to the batter

例句

The rookie pitcher throws serious gas, regularly hitting ninety-eight miles per hour.

這位菜鳥投手能投出時速超過一百五十公里的快速球。

phrase: throws gas

Scouts came from three teams to watch him throw gas at the championship game.

三支球隊的球探都來觀看他冠軍賽中投出的火球。

同義詞
  • heat

    an equally common baseball slang term for a very fast pitch

  • smoke

    another baseball slang word for a fast, powerful pitch

反義詞
  • changeup

    a slow pitch meant to surprise the batter after faster pitches

用法筆記

Baseball slang only. 'Throw gas' means to pitch a very fast fastball. 'Gas' in this sense is sometimes replaced by 'heat' ('throw heat') or 'smoke' ('throw smoke').

gases — 動詞