n.售票员；导体；指挥
The conductor punched his bus ticket. 售票员用剪票夹在他的汽车票上打孔。
She knows why the metal is the good conductor. 她知道金属为什么是好的导体。
Rubber is not a conductor, and neither is plastics. 橡胶不是导体，塑料也不是导体。
With his baton the conductor was beating time. 指挥用指挥棒着打拍节。
n.半导体
列车乘务人员
n.超导体
超导体
半导体
n.光电导体(光敏电阻)
