1
the pendulum swings
过去式为 swung；可借指局势、观点等的摇摆变化。
The pendulum swings from side to side.
钟摆来回摆动。
钟摆；摆
pendula — plural of pendulum
先理解核心含义，再看它在真实句子里的用法。
钟摆；摆
a weight hung from a fixed point so that it can swing freely back and forth under the influence of gravity
The pendulum swings from side to side.
钟摆来回摆动。
悬挂在固定支架上,在重力作用下自由摆动的物体,常用于调节钟表等装置。
A body suspended from a fixed support so that it swings freely back and forth under the influence of gravity, commonly used to regulate various devices such as clocks.
一种装置,由一个物体安装而成,使其在重力作用下自由摆动
an apparatus consisting of an object mounted so that it swings freely under the influence of gravity
悬挂在天花板上的灯等。
A lamp, etc. suspended from a ceiling.
手表连接表链的护环。
A watch's guard-ring by which it is attached to a chain.
The pendulum in the grandfather clock swings gently with each tick.
落地钟里的钟摆随着每一声滴答轻轻摆动。
The teacher asked us to measure the length of a pendulum and record its swing time.
老师让我们测量钟摆的长度并记录其摆动时间。
Her feelings for the city swung like a pendulum between love and frustration.
她对这座城市的感情像钟摆一样在喜爱与沮丧之间摇摆不定。
过去式为 swung；可借指局势、观点等的摇摆变化。
The pendulum swings from side to side.
钟摆来回摆动。
常用于比喻，主语为事件或因素，表示使局面发生反转。
The scandal swung the pendulum of public opinion against the government.
丑闻使舆论的钟摆倒向反对政府的一边。
这是固定表达，指观点或时局的大幅转向，后可接 toward/to 说明方向。
The swing of the pendulum toward reform has been dramatic.
形势向改革方向的转变非常剧烈。
Not this
Pendulum swings back and forth.
Use this
The pendulum swings back and forth.
pendulum 是可数名词，单数使用时前面需要冠词或限定词；加上 the 表示特指某只钟摆，句子才完整自然。
Not this
She wore a golden pendulum on her necklace.
Use this
She wore a golden pendant on her necklace.
pendulum 指钟摆或摆动装置，而项链上的垂饰是 pendant；两者拼写相近但意思不同，不能混用。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
摆钟
The old pendulum clock in the hallway still keeps accurate time.
走廊里的那座老摆钟仍然走时准确。
摆动（运动）
The pendulum motion of the metronome sets the rhythm for the musician.
节拍器的摆动为乐手设定节奏。
风向改变；局势逆转
As the pendulum swings, public opinion may shift again.
随着风向改变，舆论可能再次转向。
钟摆效应；交替反复的现象
Analysts see a pendulum effect in the alternation between big and small cars.
分析师在大小车型的交替循环中看到了钟摆效应。
舆论的摇摆
The pendulum of public opinion has swung against the new policy.
舆论的钟摆已经摆向反对这项新政策。
（局面、舆论等的）钟摆式转变
The swing of the pendulum means that voters will soon want a change.
局势的钟摆式转变意味着选民很快就会想要改变。
形势逆转；风向转变
In politics, the pendulum swings between two parties over time.
在政治中，形势会随着时间的推移在两党之间来回摇摆。
《陷坑与钟摆》（埃德加·爱伦·坡的经典恐怖短篇小说）
I had to analyze Edgar Allan Poe's 'The Pit and the Pendulum' for my English class.
我必须在英语课上分析埃德加·爱伦·坡的《陷坑与钟摆》。
Use pendula naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
pendulum 里 pend 像“挂”（pendant），钟摆挂在高处，左右摇摆不定。
语域：mixed 常见场景：物理/机械装置、比喻（局势、舆论等摇摆不定） pendulum 既指钟摆这类摆动装置，也常用于比喻“摇摆不定的事态（如舆论或政策）”。多用于书面或正式语境，日常口语中常以 the pendulum swings/swung 这类固定说法出现。
没有严格押韵的词。curriculum和speculum与pendulum共享末尾拼写-ulum（发音相似但不完全相同）；pendant、depend、pending与pendulum共享开头拼写pend-，但发音差异明显。
Dictionary facts from ECDICT, OCTANOVE, WIKTIONARY.