核心畫面
Picture a piece of card folded once down the middle. On its own it holds nothing; but slip twenty loose sheets inside and they stop being twenty stray papers and become one thing you can carry. A folder is that fold — a container whose only job is to keep things that belong together from drifting apart.
可以想成一張對折過一次的厚紙。它自己什麼都不是，但把二十張散紙夾進去，那二十張就不再各走各的，而變成一疊可以一手拿起…更多收起
可以想成一張對折過一次的厚紙。它自己什麼都不是，但把二十張散紙夾進去，那二十張就不再各走各的，而變成一疊可以一手拿起來的東西。folder 就像那個「折」——一個只做一件事的容器：讓該在一起的東西不要散開。原始詞典資料4 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。
foldernoun/ˈfoʊldɚ/
- 1
An organizer that papers are kept in, usually with an index tab, to be stored as a single unit in a filing cabinet.
- I keep all my schoolwork in a yellow folder.
- 2
computingengineeringmathematicsA virtual container in a computer's file system, in which files and other folders may be stored. The files and subfolders in a folder are usually related.
- My essays are in the folder named "Schoolwork".
- 3
A machine or person that folds things.
- 4
A folding knife, typically a folding pocketknife.
- A funny name for a knife, the Needs Work folder is purpose-built as a working folder, and includes a straight, plain-edge, modified-wharncliffe blade, and a comfortable, ergonomic handle.
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。