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A fulcrum is the point that a lever turns on, rests on, or is held up by while it lifts or moves something. A lever is just a bar. One part of the bar sits on something solid; that solid point is the fulcrum. The easy picture is a see-saw: the middle support is the fulcrum. When one child sits down, the other child goes up, because the bar turns on that point. In science class you use the same idea with a metal bar and weights. Though actually, people also stretch the word in careful writing and news: they call an idea or a person “the fulcrum” when everything else turns on it. That use is more formal than playground talk. The word was borrowed from Latin fulcrum, a or the foot of a couch, from fulciō, “to prop up, to support.”
組成Borrowed from Latin fulcrum (“bedpost, foot of a couch”), from fulciō (“prop up, support”).
原始詞典資料3 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，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。
Fulcrumname
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governmentmilitarypoliticsNATO code name for the Soviet MiG-29 aircraft.
fulcrumnoun/ˈfʊlkɹəm/
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engineeringmechanical-engineeringmechanicsThe support about which a lever pivots.
- It is possible to flick food across the table using your fork as a lever and your finger as a fulcrum.
- MILDRED: Archimedes said give me a lever long enough and a fulcrum on which to place it and I will move the world. CHARLOTTE: Yeah she said that twaddle eight or nine times.
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A crux or pivot; a central point.
- By this point the fulcrum of concern is the stuprum of men upon men, described as more prevalent than that upon women.
- Chelsea's Mason Mount is a top-class talent while West Ham midfielder Declan Rice has moved his game on to another level this season and will be the fulcrum of England's midfield this summer.
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。