- 1
An electric tool for making a surface smooth, especially wood. A rough sheet — sandpaper — is fixed to the bottom, and a motor moves it very fast, either spinning in circles or shaking back and forth, so it rubs away the rough top of the wood far quicker than a hand could.
An electric tool一種電動工具 for making a surface smooth用來把表面磨平滑, especially wood尤其是木頭表面。A rough sheet — sandpaper — is fixed to the bottom底部裝著一張粗糙的紙，也就是砂紙, and a motor moves it very fast馬達會讓它快速移動, either spinning in circles or shaking back and forth不是轉圈就是前後快速晃動, so it rubs away the rough top of the wood這樣就能磨掉木頭表面粗糙的那一層 far quicker than a hand could速度比用手快得多。
There are named types you will see in a hardware shop: an orbital or 'random orbit' sander for general smoothing, a belt sander with a loop of sandpaper for taking a lot off fast, a detail or corner sander with a pointed pad for tight spots. The word can also just mean a person who does the sanding, since '-er' works for both people and machines, but in real speech the machine is what people mean.
There are named types you will see in a hardware shop五金行裡你會看到幾種有特定名稱的類型: an orbital or 'random orbit' sander for general smoothing圓軌式或「隨機軌道」砂磨機用來一般性地磨平, a belt sander with a loop of sandpaper for taking a lot off fast帶式砂磨機用一圈砂紙帶快速磨掉大量材料, a detail or corner sander with a pointed pad for tight spots尖頭墊片的細節或轉角砂磨機用在狹窄角落。The word can also just mean a person who does the sanding這個字也可以單純指做打磨這件事的人, since '-er' works for both people and machines因為 '-er' 這個字尾既可以指人也可以指機器, but in real speech the machine is what people mean但實際上人們講這個字時通常指的是機器。
One extra sense to know if you read the news in cold countries: a sander is also a truck that spreads sand or grit on icy roads in winter. That one is common in Canada and the northern US and has nothing to do with woodwork — it is the older, plainer meaning of 'one that sands', that is, one that puts sand down.
One extra sense to know if you read the news in cold countries如果你看寒帶國家的新聞還有一個額外的意思要知道: a sander is also a trucksander 也可以指一種卡車 that spreads sand or grit on icy roads in winter在冬天於結冰的道路上灑砂或碎石。That one is common in Canada and the northern US這個用法在加拿大和美國北部很常見 and has nothing to do with woodwork跟木工完全沒關係 — it is the older, plainer meaning of 'one that sands'這是「灑砂的東西」這個更早、更直白的意思, that is, one that puts sand down也就是把砂鋪下去的東西。
組成sand + -er. Here 'sand' is being used as a verb — to sand something is to rub it smooth — and '-er' means the thing or person that does it. That verb comes from sandpaper, paper coated with sand-like grit.
原始詞典資料7 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。
Sandername/ˈsɑːndə/
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obsoleteA diminutive of the male given name Alexander, from Ancient Greek.
- 2
A surname transferred from the given name.
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A village in Norway.
sandernoun/ˈsændɚ/
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A person employed to sand wood.
- 2
A machine to mechanize the process of sanding.
- The autophiles hang around a big, fluorescent-lighted garage with cars on cinder blocks, ostensibly in competition for a job, and they talk to the camera in between sessions at the sander or other machines.
- 3
rail-transportrailwaystransportA device which spreads sand on the rails in wet, snowy, icy, slippery conditions to improve traction.
- Grass growing on the track made the running far from easy, and only frequent use of the sanders enabled us to breast the 1 in 50 gradients between Letterkenny and Kilmacrenon [sic].
- Traditionally, sand was used to aid grip, being released onto the track in front of the wheels from a special 'sandbox'. However, the Slough accident led to two trials on the use of train-borne sanders to aid braking: [...] Now, all new stock is fitted with automatic sanders, as have most of the pre-1994 units still running.
- 4
historicalA small device resembling a salt shaker but containing sand that was shaken over a document to remove excess ink.
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。