B2 someone who directs the performance of musicians or a piece of music(合唱团、乐队等的)指挥
US UK guard a railway official who travels on and is responsible for a train列车长
UK someone whose job is to sell tickets on a bus, train, or other public vehicle(公共汽车、火车或其他交通工具上的)售票员
a substance that allows heat or electricity to go through it导体
noun¹
noun²
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