collector n. 收集家,收税员；
commentator n. 注解者；
commutator n. 换向器,整流器；
competitor n.竞争者，敌手；
conductor n.售票员；(乐队)指挥
扩展资料
This clock is a collectors item.
这座钟是珍藏。
He earned his living as a tax collector.
他以收税为业。
He became a ticket collector at Waterloo Station.
他在滑铁卢车站当上了一名检票员。
Joseph Smith was a voracious book collector.
约瑟夫·史密斯是个如饥似渴的藏书家。
As they guffawed loudly, the ticket collector arrived
他们正哈哈大笑的时候，检票员到了。
