addition

addition — 名詞

1. the math operation in which several quantities are combined into a single total

1.名詞B2
釋義

加法

把數字相加得出總和的算術運算

the math operation in which several quantities are combined into a single total — for example, working out that 3 plus 4 equals 7.

例句

Mr. Chen taught the children simple addition using small wooden blocks.

陳老師用小木塊教孩子們簡單的加法。

teach + simple addition (school context)

Nia can do addition in her head, but she still needs paper for division.

Nia 心算加法沒問題，但除法還是要用紙筆。

do addition (typical verb collocation)

同義詞
  • summation

    more formal or technical; common in maths textbooks

  • totalling

    describes the activity of finding a total rather than the named operation

反義詞
  • subtraction

    the opposite math operation, taking one number away from another

用法筆記

Uncountable in this sense — never 'an addition' or 'additions' when referring to the math operation. Distinguish from sense 5 (the act of adding something physical) by context: numbers and totals point here.

常見錯誤

❌She is good at additions.
✅She is good at addition.
💡uncountable when meaning the math operation.

2. used in the fixed phrase 'in addition' or 'in addition to' to bring up another p

2.名詞B1
釋義

此外；另外

補充提及另一人或事物

used in the fixed phrase 'in addition' or 'in addition to' to bring up another person, fact, or thing on top of what you have already mentioned.

例句

In addition to teaching English, Renata runs a small bakery on weekends.

除了教英文之外，Renata 週末還經營一家小麵包店。

in addition to + -ing

The hotel has a swimming pool, and in addition, every room has a sea view.

這家飯店有游泳池，此外每個房間都看得到海景。

'in addition' as sentence connector

同義詞
  • as well as

    more conversational; 'in addition to' is slightly more formal

  • besides

    can replace 'in addition to' but often suggests 'apart from'

  • moreover

    more formal; only replaces 'in addition' as a sentence connector, not 'in addition to'

文法句型

in addition to + noun/-ing

in addition (sentence connector)

用法筆記

Almost always appears inside the phrase 'in addition' or 'in addition to' — 'in addition' alone joins two sentences, while 'in addition to' takes a noun or -ing form after it. Slightly more formal than 'as well as' or 'and also'.

常見錯誤

❌In addition of her salary, she earns extra money.
✅In addition to her salary, she earns extra money.
💡the preposition is 'to', not 'of'.
❌In addition to work hard, he saves money.
✅In addition to working hard, he saves money.
💡use the -ing form after 'in addition to'.

3. an extra thing that has been put together with what was already there, often to

3.名詞B1
釋義

新增物；添加

加進原有事物中、讓它更完整的物品

an extra thing that has been put together with what was already there, often to make it bigger, better, or more complete.

例句

The vintage red scarf was a lovely addition to Nia's winter wardrobe.

那條復古紅圍巾為 Nia 的冬季衣櫥增添了一筆亮點。

a + adjective + addition to + noun

Garlic and lemon are useful additions to this fish recipe.

大蒜和檸檬是這道魚料理裡很實用的搭配。

plural countable use

同義詞
  • extra

    more informal; emphasises the bonus aspect

  • supplement

    more formal; often suggests something that completes or supports

  • accessory

    narrower; usually a small added item, especially for clothing or equipment

文法句型

a/the addition to + noun

用法筆記

Almost always followed by 'to + noun' to name what the extra thing is added to. Distinguish from sense 4 (a new person joining a group) by checking whether the referent is a thing or a person.

常見錯誤

❌The scarf was a nice addition for her wardrobe.
✅The scarf was a nice addition to her wardrobe.
💡the preposition is 'to', not 'for'.

4. a person, baby, or animal who has recently joined a family, team, or other group

4.名詞B2
釋義

新成員

剛加入家庭、團隊或群體的人或寵物

a person, baby, or animal who has recently joined a family, team, or other group.

例句

Baby Hiro is the newest addition to the Yael family.

小寶寶 Hiro 是田中家最新的成員。

the newest addition to the family (set phrase)

Coach Park introduced the team's two new additions before the match started.

比賽開始前，Park 教練介紹了隊上兩名新進球員。

plural countable use for new members

同義詞
  • newcomer

    neutral; emphasises the person is new but not necessarily welcomed

  • recruit

    narrower; usually for jobs, sports teams, or the military

文法句型

a/the addition to + group noun

用法筆記

Subject is typically a person, baby, or pet, and the phrase usually ends with 'to + group noun' (the family, the team, the staff). Distinguish from sense 3 by the referent being animate.

常見錯誤

❌The baby is a new addition for our family.
✅The baby is a new addition to our family.
💡use 'to', not 'for'.

5. the action of putting one substance, ingredient, or feature into something so th

5.名詞B2
釋義

添加；加入

把某種東西加入另一物中的動作

the action of putting one substance, ingredient, or feature into something so that it becomes part of it.

例句

The addition of fresh basil completely changed the flavour of the tomato sauce.

加入新鮮羅勒徹底改變了番茄醬的風味。

the addition of + ingredient

With the addition of a small fan, the kitchen feels much cooler in summer.

加裝一台小電風扇之後，廚房在夏天涼快多了。

with the addition of + noun (causal)

同義詞
  • introduction

    more formal; emphasises bringing something in for the first time

  • inclusion

    stresses being made part of a set rather than mixed in

反義詞
  • removal

    the opposite act — taking the substance out

文法句型

the addition of + noun

用法筆記

Almost always uncountable and used in the structure 'the addition of X (to Y)'. Distinguish from sense 3: this names the act, while sense 3 names the thing that has been added.

常見錯誤

❌The addition with sugar made it sweeter.
✅The addition of sugar made it sweeter.
💡use 'of' before the substance being added.

6. a new room, wing, or section that has been built onto a home, school, or similar

6.名詞B2
釋義

增建部分

蓋在原建築旁、讓房屋變大的新空間

a new room, wing, or section that has been built onto a home, school, or similar structure to make it larger.

例句

The Garcias built a sunny addition at the back of their house for their grandmother.

Garcia 一家在後院加蓋了一間採光很好的房間給奶奶住。

build an addition (American usage)

The school's new addition will hold three science labs and a small library.

學校新蓋的這一棟會放三間自然科實驗室和一間小圖書室。

new addition (school building context)

同義詞
  • extension

    preferred in British English for the same idea

  • annex

    usually a separate-looking section, sometimes connected by a corridor

  • wing

    a large side section, more common for big buildings like hospitals or schools

文法句型

an addition to + building

用法筆記

Common in American English; British speakers often prefer 'extension' for the same idea. Subject is usually a piece of a building (room, wing, storey) rather than furniture or decoration.

常見錯誤

❌They built an addition for their house last summer.
✅They built an addition to their house last summer.
💡the preposition is 'to', not 'for'.