They've been replaced by aliens or robots "Thank you" by Martians, by CIA agents, by trained actors and actresses.

比如变成了外星人或者机器人,"谢谢",或者变成了火星人,中情局特工,或是训练有素的演员

耶鲁公开课 - 心理学导论课程节选

One could easily, for example, differentiate between a red cell and a neuron, but a skilled biologist who's looked at many, many different cells could differentiate between different types of neurons.

普通人可以很轻易的,分辨出神经元和红细胞,然而一个训练有素的生物学家,辨识过许多不同细胞之后,能够分辨出不同种类的神经元

耶鲁公开课 - 生物医学工程探索课程节选

responding and serving American Express and more and more, this type of service provision giving them sort of English speaking trained manpower is available and giving time change...at night all services can be provided there and now including diagnosis... -Yes.

为美国快递公司提供服务,这种现象越来越多,这种服务,相当于提供给美国公司,训练有素的英文人力,而且可以承担晚班,这样公司就能提供全天候服务了,现在甚至可以代诊，-没错。

普林斯顿公开课 - 国际座谈会课程节选