做事的能耐（內在的容量）
把「能收進多少」從容器搬到人身上：一個人的頭腦或心裡能承載、能運轉多少，就成了他的能力與承受力。
capacity (ability to do/understand) · noun · B2
A person's power or natural ability to do, feel, or understand something.
能力
核心畫面
You can picture capacity as the size of an inner space and the question 'how much can this take in before it is full?' — a , a hall, a mind, a factory all have a limit to how much they can hold or receive.
可以想成一個容器內部的大小，以及一個問題：「裝到滿之前，這裡面能收進多少？」一個水壺、一間禮堂、一個人的頭腦、一座工…更多收起
可以想成一個容器內部的大小，以及一個問題：「裝到滿之前，這裡面能收進多少？」一個水壺、一間禮堂、一個人的頭腦、一座工廠，都有一條「能裝多少／能接收多少」的上限。capacity 講的就是這條上限。From the word’s history
From Latin capax 'able to hold much', from capere 'to take, hold'. The root meaning is literally 'how much can be taken in', which sits directly under every modern sense.
源自拉丁文 capax「能裝很多的」，再往上是 capere「拿、收進」。字根的意思就是「能收進多少」，這正好托住下面每一個現代用法。
etymonline.com/word/capacity
From the picture
工廠／引擎的容量（規模與產出）
把「能裝／能處理多少」放到機器和工廠上：一條產線一段時間內最多吞得下多少、做得出多少，一具引擎內部又能塞進多少氣與油。
capacity (production capacity) · noun · B2
The amount that a factory, company, or machine is able to produce or deal with.
產能
做事時的身分（以什麼角色出面）
從「一個人能裝下的角色」延伸：你此刻是「以哪個身分」在說話、在做事，就像暫時被放進某個職位這個容器裡。這一支離核心稍遠，是 in the capacity of 這個固定說法帶出來的。
capacity (role or job) · noun · B2
The particular job or role a person has when they do something.
身分／職務
Also in this word
capacity (max amount held) · noun · B2
The largest amount that a container, room, or place can hold.
容量
原始詞典資料12 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
capacitynoun/kəˈpæsɪti/
- 1
The ability to hold, receive, or absorb.
- 2
A measure of such ability; volume.
- 3
A measure of such ability; volume.
- It was hauling a capacity load.
- The orchestra played to a capacity crowd.
- 4
Capability; the ability to perform some task.
- Surprisingly few men are lacking in capacity, but they fail because they are lacking in application. Either they never learn how to work, or, having learned, they are too indolent to apply themselves with the seriousness and the attention that is necessary to solve important problems.
- 5
The maximum that can be produced.
- 6
The maximum that can be produced.
- Its capacity rating was 150 tons per hour, but its actual maximum capacity was 200 tons per hour.
- 7
The potential for growth and development.
- 8
The potential for growth and development.
另外 3 個記錄的用法
- 9
A role; the position in which one functions.
- 10
A role; the position in which one functions.
- 11
Electrical capacitance.
capacityadj/kəˈpæsɪti/
- 1
Filling the allotted space.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。