And one answer to why we eat and when we eat is that there's cues in the environment that are associated with eating.

对与这个问题，有一种解释认为,这是因为环境中存在着,与进食有关的提示线索。

耶鲁公开课 - 心理学导论课程节选

What happens is you become sensitive to a cue that an event is about to happen and that allows you to prepare for the event.

经典条件作用使得你对预示着,即将发生之事的提示线索变得敏感,这使得你能够为即将发生的事件作好准备。

耶鲁公开课 - 心理学导论课程节选

And these cues generate hunger.

这些提示线索会使你产生饥饿感。

耶鲁公开课 - 心理学导论课程节选