n.售票員；導(dǎo)體；指揮

The conductor punched his bus ticket. 售票員用剪票夾在他的汽車票上打孔。

She knows why the metal is the good conductor. 她知道金屬為什么是好的導(dǎo)體。

Rubber is not a conductor, and neither is plastics. 橡膠不是導(dǎo)體，塑料也不是導(dǎo)體。

With his baton the conductor was beating time. 指揮用指揮棒著打拍節(jié)。

n.半導(dǎo)體

列車乘務(wù)人員

n.超導(dǎo)體

超導(dǎo)體

半導(dǎo)體

n.光電導(dǎo)體(光敏電阻)