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A bookend is one of a pair of heavy or sturdy objects you put at each end of a row of books so they do not fall over. They work as a pair, left and right; one alone is only half the picture. People stretch the word. As a verb, to bookend something is to put similar things at the start and the finish: a night of songs bookended by two slow ones. As a noun, “the bookends of her career” can mean the first and last parts. The object on the shelf is the home meaning; the start-and-finish talk is a later, still-clear stretch.
書擋（一對，放在一排書兩端，免得書倒下來）
組成From book + end, as both a noun and a verb.
原始詞典資料3 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。
bookendnoun/ˈbʊkɛnd/
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A heavy object or moveable support placed at one or both ends of a row of books for the purpose of keeping them upright.
- 2
Something that comes before, after, or at both sides of something else.
- The cabinet minister's appearance served as something of a bookend to her grilling by the Home Affairs select committee in April this year[…]
- In both Episode 1 and Episode 9, which serve as bookends, Burns found fascinating footage of a 1938 event at which President Franklin Roosevelt spoke to living veterans who wore the Blue and the Gray; […]
bookendverb/ˈbʊkɛnd/
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To come before and after, or at both sides of.
- Side one has good songs bookended by better songs.
- The tale is bookended by battles – faces meatily pummelled, bones crunchily broken and throats spurtingly sliced as offstage conflicts are placed centre-screen.
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。