amplitude

/ˈæmplɪtjuːd/ (bre, ipa) · /ˈæmplɪtuːd/ (ame, ipa) · /ˈam-plə-ˌtüd -ˌtyüd/ (ame, mw)

amplitude — 名詞

1. in physics, how far a wave, signal, or swinging object moves away from its resti

1.名詞C1
釋義

振幅

波或振動偏離靜止位置的最大距離

in physics, how far a wave, signal, or swinging object moves away from its resting line at its highest or lowest point — for example, a louder sound or a stronger radio signal has greater amplitude.

例句

The amplitude of the sound wave doubled when Nikolai turned the speaker up.

Nikolai 把喇叭轉大聲後，聲波的振幅增為兩倍。

the amplitude of [wave]

Engineers measured the amplitude of the radio signal at the top of the tower.

工程師在塔頂測量無線電訊號的振幅。

measure the amplitude of [signal]

同義詞
  • magnitude

    broader — refers to overall size; amplitude specifically describes wave displacement

  • peak

    the single highest point; amplitude is the distance from rest to that point

文法句型

the amplitude of [wave/signal]

用法筆記

Subject is usually a wave, signal, vibration, or swinging object. Often paired with 'frequency' in physics contexts; the two describe different properties of the same wave.

常見錯誤

❌The wave has a long amplitude.
✅The wave has a large/high amplitude.
💡amplitude is described as large/high or small/low, not long/short.

2. a great deal of something, especially the wide reach or richness of an abstract

2.名詞C2
釋義

廣度；豐富

知識、視野或情感等的廣闊與豐厚

a great deal of something, especially the wide reach or richness of an abstract quality such as knowledge, vision, or feeling.

例句

Professor Liu writes with an amplitude of vision few historians can match.

劉教授寫作時展現的視野廣度，少有歷史學家能比。

amplitude of vision (formal)

The novel impressed critics with its amplitude of feeling and warm humour.

這本小說以情感的豐厚與溫暖的幽默感打動了評論家。

amplitude of feeling

同義詞
  • abundance

    more common; emphasises a large supply, less literary feel

  • breadth

    stresses wide range or scope rather than sheer quantity

  • fullness

    emphasises richness and completeness; close to 'amplitude' but warmer in tone

反義詞
  • scarcity

    the opposite — a noticeable lack of something

  • narrowness

    opposite when amplitude refers to range or scope

文法句型

amplitude of [abstract noun]

用法筆記

Distinct from sense 1: this sense is uncountable and abstract, never about waves or measurable physical motion. Mostly limited to literary or academic prose; in everyday speech, 'plenty', 'wealth', or 'breadth' sound more natural.

常見錯誤

❌There was amplitude of food at the party.
✅There was plenty of food at the party.
💡sense 2 is formal/literary and rarely fits everyday objects like food or drink.