You're--and to put it in a crude way, you're teaching the dog that the bell goes with the food.

简单地说，你在让狗知道,铃声和食物是一起出现的。

耶鲁公开课 - 心理学导论课程节选

And later on if you right before or right during you give the dog some food you--you ping a bell the bell will cause the saliva to come forth.

,在喂食前或者喂食过程中,你摇铃,铃声就会加速唾液的分泌。

耶鲁公开课 - 心理学导论课程节选