Tremolo is a music word for one note, or two notes, played over and over very fast so the sound shakes or trembles instead of sitting still. Violin players make it by moving the bow quickly back and forth on one string; singers make it with a fast wobble in the voice; on an organ or a guitar amplifier a switch does it for you.

Tremolo這個字 is是 a music word一個音樂用語 for one note指的是一個音，or two notes或兩個音，played over and over被反覆彈奏 very fast非常快，so所以 the sound聲音 shakes or trembles會抖動、顫動 instead of sitting still而不是穩穩不動。Violin players小提琴手 make it做出這效果 by moving the bow用弓 quickly back and forth快速來回拉 on one string在同一條弦上；singers歌手 make it做出來 with a fast wobble用聲音快速的擺動 in the voice；on an organ or a guitar amplifier在風琴或吉他音箱上 a switch一個開關 does it for you就能幫你做到。

The effect sounds tense or excited, so films use it under a scary or waiting moment. It is a countable noun ('a long tremolo') and also works in front of other words ('a tremolo effect', 'the tremolo arm on a guitar').

The effect這個效果 sounds聽起來 tense or excited緊張或興奮，so所以 films電影 use it會用它 under放在 a scary or waiting moment恐怖或等待的橋段底下。It它 是 a countable noun可數名詞（'a long tremolo'「一段長長的顫音」）and而且 also works也可以放在 in front of other words其他字前面（'a tremolo effect'「顫音效果」、'the tremolo arm on a guitar'「吉他上的顫音搖桿」）。

Two cautions about how people really talk: guitarists call the little bar that bends the pitch a 'tremolo arm', but that bar actually changes pitch, which is properly called vibrato — a famous mix-up that the industry never fixed. And ordinary listeners often say 'tremolo' for any shaky voice, including an old person's unsteady singing.

Two cautions有兩點要注意 about how people really talk關於大家實際上怎麼說：guitarists吉他手 call the little bar把那根小搖桿 that bends the pitch可以改變音高的 a 'tremolo arm'叫做「tremolo arm」，but但 that bar那根搖桿 actually其實 changes pitch改變的是音高，which而這 is properly called正式的名稱應該是 vibrato「vibrato（抖音）」——a famous mix-up一個有名的混淆 that the industry never fixed業界一直沒有改正過來。And而 ordinary listeners一般聽眾 often常常 say 'tremolo'把「tremolo」用來說 for any shaky voice任何顫抖的聲音，including包括 an old person's unsteady singing老人家不穩的歌聲。