fifth-wheel

英 ['fɪfθw'iːl] 美 ['fɪfθw'iːl]

• 半拖车接轮

英英释义

名词 fifth wheel:

1. someone or something that is unwanted and unneeded

2. an extra car wheel and tire for a four-wheel vehicle

3. a steering bearing that enables the front axle of a horse-drawn wagon to rotate