But in the nineteenth century, they developed the Postal Service and it interacted with the railroad.

不过在19世纪人们发展出了邮政服务，人们发展出了邮政服务,并开始借助于火车。

耶鲁公开课 - 金融市场课程节选

You know, I started off as a waiter.

你知道，我最早开始时做服务生。

我就是超人 - SpeakingMax英语口语达人