像葉子的薄片（書頁、桌板）
把葉子「又扁又薄的一片」這個形狀，搬到人造的東西上：一片薄薄的紙、一塊薄薄的板，看起來都像一片葉。
leaf (page of a book) · noun · B1
One single sheet of paper in a book, with a printed page on each side.
書頁；一張書紙
核心畫面
Picture the flat, thin, green blade growing out of a plant. Almost everything else about this word comes from that one shape: something flat and thin like a leaf. A page in a book is a leaf; an add-in panel of a table is a leaf; and two common sayings borrow the book-page image.
可以想成一片從植物上長出來、又扁又薄的綠葉。這個字幾乎所有其他意思，都是從這個形狀延伸出來的：一樣又扁又薄，像一片葉…更多收起
可以想成一片從植物上長出來、又扁又薄的綠葉。這個字幾乎所有其他意思，都是從這個形狀延伸出來的：一樣又扁又薄，像一片葉子。書裡的一張紙叫 leaf，桌子可加裝的一塊板也叫 leaf，還有兩句常用的說法借用了「書頁」這個畫面。From the picture
翻書頁的比喻（慣用語）
這兩句慣用語都建立在「leaf＝書頁」上：把書頁翻一翻、或從別人書裡抽一頁，變成關於做人做事的比喻。
turn over a new leaf · noun · B1
Used in the phrase 'turn over a new leaf' — to start behaving in a better way and leave your old bad habits behind.
改過自新；重新開始
Also in this word
leaf (plant) · noun · B1
One of the flat, thin, usually green parts that grow out from the stem or branches of a plant or tree.
葉子
原始詞典資料22 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。
Leafname詞源 1
- 1
A surname from Old English.
Leafnoun詞源 2
- 1
A Canadian person.
- 2
slangA member of the Toronto Maple Leafs hockey team, its organization, or its supporters.
- 3
A model of car built by Nissan, with a name chosen for its green connotations.
leafnoun/liːf/
- 1
The usually green and flat organ that represents the most prominent feature of most vegetative plants.
- Earless ghost swift moths become “invisible” to echolocating bats by forming mating clusters close (less than half a meter) above vegetation and effectively blending into the clutter of echoes that the bat receives from the leaves and stems around them.
- 2
biologybotanynatural-sciencesA foliage leaf or any of the many and often considerably different structures it can specialise into.
- 3
Anything resembling the leaf of a plant.
- 4
advertisingartsbookbindingA sheet of a book, magazine, etc. (consisting of two pages, one on each face of the leaf).
- Heretofore advertisers have had to buy and pay for a leaf — two pages.
- 5
A sheet of any substance beaten or rolled until very thin.
- gold leaf
- 6
One of the individual flat or curved strips of metal, typically made of spring steel, that make up a leaf spring.
- Lumbering down a precipitous "slideway," the Thornycroft broke two main leaves in the back spring[.]
- 7
Tea leaves.
- 8
A flat section used to extend the size of a table.
另外 7 個記錄的用法
- 9
A moveable panel, e.g. of a bridge or door, originally one that hinged but now also applied to other forms of movement.
- The train car has one single-leaf and two double-leaf doors per side.
- The bridge shear locks were repaired and the long ends of the shear locks shortened about two inches to eliminate butting of the bridge leafs against each other.
- 10
computingengineeringmathematicsIn a tree, a node that has no descendants.
- The algorithm pops the stack to obtain a new current node when there are no more children (when it reaches a leaf).
- 11
The layer of fat supporting the kidneys of a pig, leaf fat.
- 12
One of the teeth of a pinion, especially when small.
- 13
slangCannabis.
- 14
A Canadian person.
- 15
computingengineeringmathematicsA particular value of the EAX register when a program runs the CPUID instruction; each leaf represents a different category of information returned about the processor.
- X86_FEATURE_HETERO_CORE_TOPOLOGY is used to identify whether the processor support heterogeneous core type by reading CPUID leaf Fn_0x80000026_EAX and bit 30. if the bit is set as one, then amd_pstate driver will check EBX 30:28 bits to get the core type.
leafverb/liːf/
- 1
To produce leaves; put forth foliage.
- Then flowered the mead, then leafed all 'Twas caused by the runic lay.
- 2
To divide (a vegetable) into separate leaves.
- The lettuce in our burgers is 100% hand-leafed.
- 3
informalTo play a prank on someone by throwing a large clump or collection of leaves at them.
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。