担心会伤害到鹦鹉，杰西赶紧打开了冰箱门。

Fearing that she might hurt the parrot, Jessie quickly opened the door of the fridge

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最后，我把冰箱门关上了。

Finally, I closed the fridge door.

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大卫害怕他可能会伤害到那只鸟，于是迅速打开了冰箱门。

David was frightened that he might have hurt the bird and quickly opened the fridge door.

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and then finally you get him to also open up the refrigerator and get the beer, open the door, and in that way you can train creatures to do complicated things.

最终你还是让他打开了冰箱,取出了啤酒，打开冰箱门，用这种方法,你可以训练各种生物去做些复杂的事情。

耶鲁公开课 - 心理学导论课程节选