a fifth wheel
基本解釋
- 多余的人
- 多余的東西
英漢例句
- A car does not need a fifth wheel.
一輛車通常不需要第五只輪子。 - By definition, a fifth wheel is a wheel or a portion of a wheel with two parts rotating on each other that sits on the front axle of a carriage and adds extra support so it doesn’t tip.
通過定義，第五個輪子，是成為一個四輪馬車的前車軸上互相旋轉(zhuǎn)的兩個部分的一個輪子或一個輪子的一部分，而加上一個額外的輔助輪子，這樣它就不會傾斜。 - He was the only one without a date, so he felt like a fifth wheel.
他是唯一沒被邀請的人，因此他感到自己很是多余。 - Trailers are typically attached to tractors by a "fifth wheel, " in which a coupling pin on the trailer fits into the center of a large horseshoe-shaped piece of metal.
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