Well, for instance, you could build machines that when babies suck on a pacifier they hear music or they hear language, and then you could look at how much they suck on the pacifier to determine what they like.

举例来说,你可以制造一个机器,每当婴儿吮吸奶嘴,他们就会听到音乐或是话语,然后你可通过观察婴儿有多喜欢吮吸奶嘴,来确定他们喜欢音乐还是话语

耶鲁公开课 - 心理学导论课程节选

And you hear all sorts of different languages if you just stand here for five minutes.

如果你站在这儿五分钟，你就会听到各种不同的语言。

有很多旅行者 - SpeakingMax英语口语达人