Well, you can't adopt the policy of "I'm going to wait for this pig to dance " and when it does I'm going to reinforce it" because it's going to take you a very long time.

那么，你就不能说,“我要等这头猪跳舞,然后再对它进行强化“,因为这会花掉你很长的时间。

耶鲁公开课 - 心理学导论课程节选

Which is sort of a childhood nursery rhyme. And then they cut to this pig and a car with two pin wheels,

这是小时候的儿歌。然后镜头切换到猪和有风车的车，

广告泛滥 - SpeakingMax英语口语达人