A propeller is a piece of equipment with two or more blades that spin around a centre. The spinning pushes air or water backwards, and that push moves an aircraft or a ship forwards.

A propeller螺旋槳 is a piece of equipment是一種裝置 with two or more blades有兩片以上的葉片 that spin around a centre繞著中心旋轉。The spinning這旋轉 pushes air or water backwards把空氣或水往後推 and that push這股推力 moves an aircraft or a ship forwards讓飛機或船往前動。

Small planes often have a propeller on the nose; boats have one under the water at the back.

Small planes小飛機 on the nose在機頭 often have a propeller常常裝螺旋槳; boats船 under the water at the back在船尾水裡 have one則是裝一個。

The word is ordinary technical English — not fancy, not slang. Though actually, a ceiling fan is not a propeller, even though the shape looks similar; we keep propeller for the thing whose job is to move the vehicle.

The word這個字 is ordinary technical English是普通的技術性英文 not fancy不花俏 not slang也不是俚語。Though actually不過其實, a ceiling fan吊扇 is not a propeller不是螺旋槳, even though the shape looks similar雖然形狀看起來很像; we keep propeller我們把螺旋槳這個詞留給 for the thing whose job is to move the vehicle負責推動交通工具的東西。

A big jet airliner usually has no propeller you can see; jet engines work another way. People also say “the props” in casual talk about planes, but the full word is the one you want in a textbook.

A big jet airliner大型噴射客機 usually has no propeller you can see通常看不到螺旋槳; jet engines噴射引擎 work another way運作方式不一樣。in casual talk about planes講到飛機時 People also say "the props"口語也會說「the props」 but the full word is the one you want in a textbook但寫在課本裡要用完整的字。